Which is a compound-complex sentence?

Question

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1 point
I studied for the test, and I felt confident because I practiced a lot.
The boy ran.
She sings and dances.
Since it was raining, we stayed inside.

Answer 1

The compound-complex sentence is:

I studied for the test, and I felt confident because I practiced a lot.

This sentence contains two independent clauses ("I studied for the test" and "I felt confident") and one dependent clause ("because I practiced a lot").