Which of the following sentences is correct?
a. a clause is a group of related words, but a phrase is not.
b. a clause has a subject and verb, but a phrase does not.
c. a phrase has a subject and verb, but a clause does not.
d. a phrase is a group of related words, but a clause is not

If you are unsure whether a group of words is a clause or phrase, break down the words into the parts of speech to help you decide. If there is a subject and a verb with a predicate, it is a clause. If there is a noun but no verb or a verb but no noun and does not have a predicate, it is a phrase. therefor it is B