Mechanical advantage is calculated by using the formula:

a
Normal Force/ Acceleration
b
Length of Slope (L) / Height of slope (H)
c
Height of Slope (H) / Length of Slope (L)
d
Force of Friction/Gravity

The correct answer is c. Height of Slope (H) / Length of Slope (L).

Mechanical advantage is a measure of the force amplification achieved by using a tool, mechanical device or machine system. It is calculated as the ratio of the output force produced by a machine to the input force applied to it. In the case of an inclined plane, the mechanical advantage is determined by dividing the length of the slope (L) by its height (H). This gives the ratio of the effort required to lift an object using the inclined plane to the weight of the object being lifted.

I would not trust the ai i have so much trouble in earth science and science and it always gives 50% on it for you so just incase i would come back to that one and wait till somebody um answers for you.