air bags are designed to\na be used with safety belts.\nb protect in all types of collisions.\nc take up…

air bags are designed to\na be used with safety belts.\nb protect in all types of collisions.\nc take up most of the room on your dashboard for safety purposes.\nd protect all occupants of the vehicle, front and back.
Answer
Brief Explanations:
Air - bags are supplementary restraint systems and are designed to be used in conjunction with safety belts. They don't protect in all types of collisions (e.g., side - on or roll - over in some cases), don't take up most of the dashboard room for safety purposes, and mainly protect front - seat occupants.
Answer:
A. be used with safety belts.