Choose the correct example of a complex sentence: The bell rang, and the students rushed out., She felt tired, so she went to bed., Although we were late, we caught the train., He plays the guitar, but his sister plays drums.

Choose the correct example of a complex sentence: The bell rang, and the students rushed out., She felt tired, so she went to bed., Although we were late, we caught the train., He plays the guitar, but his sister plays drums.

Explanation

A complex sentence contains one independent clause and at least one dependent (subordinate) clause.

The dependent clause "Although we were late" and the independent clause "we caught the train."