They have the same endings except in the nosotros and vosotros forms.
Answer:
The answer would be C.
Explanation:
Though, the correct definition of a compound sentence is a sentence with more than one subject or predicate, independant clause's contain a verb, that isnt what we are looking for. The dependant clause contains a subject or predicate, therefore your answer would be C. If I'm not correct however, I would believe it to be D.