Which is the correct way to combine the sentences into one sentence with a compound subject? Tadpoles swam in the stream. Minnows swam in the stream.

ATadpoles swam and minnows swam in the stream.

BTadpoles and minnows swam in the stream.

CTadpoles swam in the stream, and minnows swam in the stream.

DTadpoles swam in the stream with minnows.