Answer:
B to C
Step-by-step explanation:
The object height decreases
Potential energy= mass x height x gravitational force
Which means that potential energy is directly proportional to height
Thus, a decrease in height will cause a decrease in potential energy.
ENERGY cannot be wasted, it is transformed to another form, and here this form is kinetic energy as according to the gravitational force the speed increases as the object falls downward.
And kinetic energy = 1/2 mv2
Which again means that speed is directly proportional to kinetic energy
And thus an increase in speed will cause an increase in kinetic energy.