IMO, B is correct.
ANALYZE THE STIMULUS:
Fact: product sales declined several years. ==> NutriShake changed the marketing strategy
Fact: Old Strategy: focus on search engine optimization ==> Purpose: customers will purchase products DIRECTLY on Nutrishake website after they use searching tools
Fact: New Strategy: focus on referral networks, such as business social network ==> Purpose: customers will purchase products INDIRECTLY via intermediate websites
Fact: Product sales increased
Conclusion: The marketing strategy change (new strategy) improved product sales
In order to evaluate this conclusion, we need to determine whether the number of customers who go directly to Nutrishake website increased? if the number increased ==> the search engine optimization strategy might help boost the product sales.
ANALYZE EACH ANSWER:
(A) What proportion of the total revenue of NutriShake is generated by product sales?
Wrong. We only compare old marketing strategy with new marketing strategy
(B) Has the number of unique visitors to the NutriShake online site increased substantially in the last two years?
Correct. As stated above.
(C) Among all the types of social networks that provide an opportunity for Nutrishake to advertise, which type accounts for the largest proportion of the nutrition company's product sales?
Wrong. Out of scope. We don't talk about which type of account.
(D) Do any marketing partners of NutriShake have a standing order with the NutriShake for a fixed amount of advertising per month?
Wrong. Out of scope. We just compare two strategies of Nutrishake (after vs before). Nothing about partners.
(E) Among the social networks that NutriShake is implementing its marketing strategy, are there more types of business social networks or more types of entertainment social networks?
Wrong. Out of scope. We don't talk about more types of business social networks
Hope it helps.
ANALYZE THE STIMULUS:
Fact: product sales declined several years. ==> NutriShake changed the marketing strategy
Fact: Old Strategy: focus on search engine optimization ==> Purpose: customers will purchase products DIRECTLY on Nutrishake website after they use searching tools
Fact: New Strategy: focus on referral networks, such as business social network ==> Purpose: customers will purchase products INDIRECTLY via intermediate websites
Fact: Product sales increased
Conclusion: The marketing strategy change (new strategy) improved product sales
In order to evaluate this conclusion, we need to determine whether the number of customers who go directly to Nutrishake website increased? if the number increased ==> the search engine optimization strategy might help boost the product sales.
ANALYZE EACH ANSWER:
(A) What proportion of the total revenue of NutriShake is generated by product sales?
Wrong. We only compare old marketing strategy with new marketing strategy
(B) Has the number of unique visitors to the NutriShake online site increased substantially in the last two years?
Correct. As stated above.
(C) Among all the types of social networks that provide an opportunity for Nutrishake to advertise, which type accounts for the largest proportion of the nutrition company's product sales?
Wrong. Out of scope. We don't talk about which type of account.
(D) Do any marketing partners of NutriShake have a standing order with the NutriShake for a fixed amount of advertising per month?
Wrong. Out of scope. We just compare two strategies of Nutrishake (after vs before). Nothing about partners.
(E) Among the social networks that NutriShake is implementing its marketing strategy, are there more types of business social networks or more types of entertainment social networks?
Wrong. Out of scope. We don't talk about more types of business social networks
Hope it helps.