Question

Which sentence is compound? A. The Hannons stopped at a store and bought five pounds of peanut brittle. B. They hadn't planned the trip, but they returned to the store the next day and bought more peanut brittle. C. They ate the peanut brittle on the car ride home. D. Betsy and her family ate all the peanut brittle on the way home again!

Answer 1

I would say b. Just like the below comment.

Answer 2

The correct option is B.

You can test if there are two independent clauses by separating the clauses and seeing if they can stand alone.

They hadn't planned the trip.  They returned to the store the next day and bought more peanut brittle.

Since the the two clauses can stand alone, there are two independent clauses.

Two independent clauses constitute a compound sentence.