Question

The sky turned gray. The rain began to fall.

Which revision forms a compound sentence?


The sky turned gray, and the rain began to fall.

Because the sky turned gray, the rain began to fall.

When the sky turned gray, the rain began to fall.

Although the sky turned gray, the rain began to fall.

Answer 1

"The sky turned gray, and the rain began to fall."

This is a compound sentence because it joins two independent clauses ("The sky turned gray." and "The rain began to fall.") with the coordinating conjunction "and."