Answer:
C
Explanation:
A compound sentence is <u>a sentence with more than one subject or predicate</u>. They also usually are joined be coordinating conjunctions such as: <u>for, and, nor, but, or, yet, </u>and <u>so.</u> Plus, a compound sentence has 2 independent clauses.
A, is out
B is also out because it is only one clause
D is not it because there is one independent clause and one dependent clause.
It is C because the subjects are "I" and "she." The 2 independent clauses are "I called Rebecca." "She was not home."
I hope this helps!