Question

prevent the vehicle from rolling. this can be achieved by applying the parking brake or by placing chocks behind the wheels that are not being lifted.
always work on firm, level flooring (preferably concrete). this prevents the jack from sinking into the ground and the car from dropping off the jack. the shop floor should be clean, free of dirt and debris, that could keep the wheels from rolling.
the jack support cup should be positioned under a solid point on the car body or chassis.
often the car manufacturer specifies designated lifting points. these lifting points are shown in the corresponding service information and/or vehicle owners manual. positioning the jack at a non - designated lift point is dangerous and could cause damage to the vehicle.
note: some vehicles are designed with lift points that require a special adapter to be used in conjunction with the floor jack.
what should be checked before using a jack?
ensure that the weight of the vehicle does not exceed the jacks maximum load capacity.
ensure the maximum load capacity of the jack does not exceed the weight of the vehicle.
ensure that the vehicle is not too light, in relation to the maximum load capacity of the jack.

Explanation:

Before using a jack, it is crucial to ensure the vehicle's weight does not exceed the jack's maximum load - capacity. This is to prevent the jack from failing under the weight of the vehicle, which could lead to accidents and damage. The other two statements are incorrect. The jack's capacity should be equal to or greater than the vehicle's weight, and the vehicle being too light relative to the jack's capacity is not a concern for safety when using the jack.

Answer:

Ensure that the weight of the vehicle does not exceed the jack's maximum load capacity.