Which of the following is a compound sentence
A. Do you want to go to the diner?
B. After the rain stopped, the girls decided to go to the park.
C. Erin and Maria are going to the mall, and John is going to the movies.
D. Anywhere you want to go, we will follow.
C. because it is there is a subject in each sentence like A. would be diner B. would be park D. would be you and C would be mall and movies therefore it is C