Question

introduction
a floor jack is used to partially lift a vehicle from one end or the side. a relatively - small operator force is converted into a large lifting force. the floor jack transfers this force to the vehicle.
vehicles are heavy, so you should take care when lifting one. incorrect use of the floor jack can cause considerable damage to the vehicle. also, your safety (and that of others) may be put at risk.
1
what is the function of a floor jack?
to - partly lift a vehicle.
to lift all four wheels off the ground at once.
check

Explanation:

The text clearly states that a floor - jack is used to partially lift a vehicle from one end or the side and does not mention lifting all four wheels off the ground at once.

Answer:

A. To partly lift a vehicle.