contestada

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.
a. Tadpoles swam and minnows swam in the stream.
b. Tadpoles and minnows swam in the stream.
c. Tadpoles swam in the stream, and minnows swam in the stream.
d. Tadpoles swam in the stream with minnows.