When Placed in a Cage with a Soft Cloth "Mother

When placed in a cage with a soft cloth "mother" and a wire "mother" equipped with a feeding nipple,socially isolated rhesus monkeys:

A) spent more time hanging on the soft cloth mother,even though the wire mother provided nourishment.
B) spent more time hanging on the wire mother,primarily because it was equipped with a feeding nipple.
C) refused to eat altogether.
D) refused to spend any time on the soft cloth mother because it offered no nourishment.