An Object Is Attached to a Vertical Spring and Bobs

Multiple Choice

An object is attached to a vertical spring and bobs up and down between points A and B. Where is the object located when its elastic potential energy is a maximum?

A) midway between A and B
B) one-fourth of the way between A and B
C) at either A or B
D) one-third of the way between A and B
E) at none of the above points