An object is attached to a vertical ideal massless spring and bobs up and down between the two extreme points A and B.
When the kinetic energy of the object is a minimum, the object is located:

A) 1/ √2 times the distance from A to B.
B) midway between A and B.
C) at either A or B.
D) 1/4 of the distance from A to B.
E) 1/3 of the distance from A to B.