We could not have fulfilled the task in time if it ______ for their help.

A．There is no popularity that really counts.
B．What many parents are doing is in fact hindering their children from finding their own paths.
C．It is not necessarily bad for a teenager to disagree with his or her classmates.
D．Most teenagers claim that they want to do what they like to, but they are actually doing the same.

A．have much difficulty understanding each other
B．lack confidence
C．dare not cope with problems single-handed
D．are very much afraid of getting lost