Answer:
b
Explanation:
A clause is the part of a sentence that necessarily includes a verb to express the action of the sentence and also a subject that performs that action. While the verb is always explicitly states, the subject can be understood and not mentioned in the written sentence.
A clause, however, does not always make sense on its one. An independent clause can indeed stand alone as a sentence, but a dependent clause only forms part of a sentence and does no make sense by itself.
