Which sentence is not punctuated correctly?

A.
I really like eating raw vegetables, however, for some reason, I prefer my carrots cooked.

B.
She has gone to school in Paris, France; London, England; and Boise, Idaho.

C.
Ms. Davis, a well-known zoologist, spoke at the seminar; she didn't bring any animals.

D.
I think I saw your parents leaving the mall last night; they were in a light green minivan.

Question

Which sentence is not punctuated correctly?
 
 A.
I really like eating raw vegetables, however, for some reason, I prefer my carrots cooked.
 
 B.
She has gone to school in Paris, France; London, England; and Boise, Idaho.
 
 C.
Ms. Davis, a well-known zoologist, spoke at the seminar; she didn't bring any animals.
 
 D.
I think I saw your parents leaving the mall last night; they were in a light green minivan.

anonymous · Answer

I think it is D

muzzack · Answer

I'd say D, seeing as there doesn't need to be a comma before or after because.

That being said, the sentence would sound better with a few "on"s