Which one of the following sentences contains correct capitalization and punctuation? a. who is marys teacher this year? b. last summer, we visited california. c. my doctors name is dr habeeb. d. jennifer bought cupcakes diet soda and potato chips at the store.

The sentence that contains correct capitalization and punctuation is B) Last summer, we visited California.
A should be - Who is Mary's teacher...
C should be - My doctor's name is Dr. Habeeb.
D should be Jennifer bought cupcakes, diet soda, and potato chips at the store.

Well, let's see whether there are any mistakes in the sentences:

A. Who is Marys teacher this year?
here we're missing an apostrophe,the correct sentence would be:
A. Who is Mary's teacher this year? 

B. Last summer, we visited California.
-this is the correct answer!

 C. My doctors name is Dr Habeeb.
Again, a missing apostrophe! it should be:
My doctor's name is Dr Habeeb.

 D. Jennifer bought cupcakes diet soda and potato chips at the store.
Here we are missing a comma, like this:
Jennifer bought cupcakes, diet soda and potato chips at the store.