Help ASP 100 points !!!!!!!!
A student noted that the sign shown here is always associated with a wheelchair ramp at or near a staircase or entrance steps. What statement best identifies the reason why wheelchair ramps are used to move people up a staircase or steps?
A) Wheelchair ramps allow the person and the wheelchair to move vertically across a surface with little to no friction.
B) Wheelchair ramps allow the pull of gravity to decrease in order to move the person and the wheelchair up the vertical distance more easily.
C) Wheelchair ramps act as an axle for the wheels of the wheelchair in order to move the person and the wheelchair more quickly up the stairs.
D) Wheelchair ramps act as an inclined plane to move the person and the wheelchair up a vertical distance with a greater distance using less force.