No.
Check your reading assignment for rules on punctuating adjective clauses.
Select the clause from the drop-down menu to correctly punctuate this sentence.
Of all the sitters we called, only the one ? ? agree to babysit.
,who was not busy on Friday (is it this one)
who was not busy on Friday
,who was not busy on Friday,
who was not busy on Friday,
4 answers
Did you get (B) ?
The one with no commas?
The comma is inserted to offer a pause in the sentence. If you say each out loud, inserting a comma and not inserting a comma, it should sound right. As an example read out loud the sentence I just wrote, pausing where I put a comma. Then do it again but don't pause. Hear the difference?