The sum of the costs of 2 items in a grocery store is $10 and the

The sum of the costs of 2 items in a grocery store is $10 and the difference in the costs of these items is $2. The cost of the more expensive item is what percent greater than the cost of the less expensive item?

A. 25%

B. 50%

C. 66 2/3%

D. 150%

E. 500%