PLEASE ANSWER

A. Point B and D
B. Point D and E
C. Point C only
D. Point A and B

B. Point D and E

Explanation:

Kinetic energy is the energy of motion and is proportional to velocity of the object and its mass. Mathematically,

where m is mass of object and v is the velocity of the object.The object while moving upwards, starts with a high initial velocity ,thus high kinetic energy. The kinetic energy starts to reduce at point B and its minimum at point C.Potential energy is the energy of an object related to its position. Mathematically,

where m is mass of object , h is the height of the object and g is acceleration due to gravity. At point C the potential energy is maximum due to the height attained by the object.As the object falls, the potential energy starts to reduce at point D and reaches its minimum value at point E where all potential energy is converted back to Kinetic energy.

the answer is d.) potassium