The only difference between D and E is the comma before "and".
When there are more than one parallel list:1.small and old 2.that are relatively small and old, and located in central cities.
It is necessary to use a comma to distinguish between the the two lists right ? If so the comma before and is necessary. Experts please correct me if i am wrong. Thanks in advance.
When there are more than one parallel list:1.small and old 2.that are relatively small and old, and located in central cities.
It is necessary to use a comma to distinguish between the the two lists right ? If so the comma before and is necessary. Experts please correct me if i am wrong. Thanks in advance.