Question

Which of the following adds a subordinate clause to the main clause below?

I woke up early this morning.
A.
I woke up early this morning, and the birds were singing so loudly.
B.
I woke up early this morning. The birds were singing so loudly.
C.
I woke up early this morning because the birds were singing so loudly.
D.
I woke up early this morning; the birds were singing so loudly.

Answer 1

C.

"Because the birds were singing so loudly" is a subordinate (dependent) clause introduced by the subordinating conjunction "because." The other choices join two independent clauses (coordinating conjunction, period, or semicolon).