Identify whether the following sentence is grammatical. If you decide it is a run-on or fragment, choose the answer that fixes the error. Although a fire detector is not the only answer.
a. "Although" makes this sentence a dependent clause, so it is a fragment. It could be fixed by adding an independent clause at the end, after a comma, such as "Although a fire detector is not the only answer, they are an important fire prevention tool."
b. This sentence is correct
c. "Although" makes this sentence a fragment. The sentence could be fixed by adding a verb and completion of the sentence, such as "Although a fire detector is not the only answer prevents fires in many instances."