Can the operation of the airbag be dangerous in an accident?

A)Yes, always.
B)No.
C)Yes, if the seat belt is not being worn.Correct
The airbag is a passive safety system designed to work in conjunction with the seat belt, not to replace it. The seat belt restrains the body and keeps it in the proper position. If it is not used, the occupant may impact against the airbag while it is deploying at high speed (about 300 km/h), which can cause very serious injuries.