Let g be the acceleration due to gravity at the Earth's surface and k the rotational kinetic energy of the Earth. Which of the following statements is correct if the Earth's radius decreases by 2%?

A) Both the gravitational acceleration and the rotational kinetic energy will decrease.
B) Gravitational acceleration will increase, but the rotational kinetic energy will decrease.
C) Gravitational acceleration will decrease, but the rotational kinetic energy will increase.
D) Both the gravitational acceleration and the rotational kinetic energy will increase.