Question

how can air bags also cause injury?
they can hit the driver with a huge force.
they are made of a stiff, hard material.
they can get really hot.
they do not inflate fast enough.

Explanation:

Airbags deploy rapidly and with significant force. When they deploy, if a person (such as a driver) is too close to the airbag module (e.g., not sitting properly with correct seat - belt use), the force of the inflating airbag can cause injuries like bruises, abrasions, or more serious internal injuries. Airbags are designed to work in conjunction with seat - belts, and the force of their deployment is a known factor in potential injury. They are made of a fabric - like material (not a stiff, hard material in the way that would cause injury as described in option B). While there can be some heat associated with the inflation process (due to the chemical reactions in the inflator), it is not the main or most common cause of injury compared to the force of deployment (so option C is less likely). And airbags are designed to inflate very quickly (within milliseconds), so option D is incorrect.

Answer:

They can hit the driver with a huge force.