Stella is driving down a steep hill. She should keep her car to help . a. light, it speed up in a higher b. gear, slow her vehicle in a lower c. gear, slow her vehicle in a lower d. gear, speed up her vehicle

The Answer is both B and C, since it has same options from the question given. Gear, slow her vehicle in a lower

Explanation:

The use of a lower gear in a vehicle helps a person to control their speed limits, when approaching a hill. it also saves the brakes too, using the brakes down a hill can overheat the gear and causes brake failures

By changing in into a lower gear and also letting the engine to do the brake work in a vehicle, the engine will absorb a force and slow the vehicle down, but in most cases brakes can be applied but with lesser pressure.

In this case Stella need to slow down by applying her lower gear down a hill to avoid accidents on the road, by controlling her speed limits and  for safety precaution