Let g be the acceleration due to gravity at earth's surface and K.E be the rotational kinetic energy of the earth. Suppose the earth's radius decreases by 2% keeping all other quantities same, then

Options

A. g decreases by 2% and K.E. decreases by 4%.
B. g decreases by 4% and K.E. increases by 2%.
C. g increases by 4% and KE increases by 4%.
D. g decreases by 4% and K E. increases by 4%.