In the 1950s,a Famous Experiment Showed That Rhesus Monkeys Reared

In the 1950s,a famous experiment showed that rhesus monkeys reared with a soft,terry-cloth "surrogate mother" and a wire-mesh "surrogate mother," which held a bottle and was designed to be climbed onto for feeding,

A) usually developed an attachment to the wire-mesh surrogate.
B) clung to the soft terry-cloth surrogate.
C) developed an attachment to both surrogates.
D) did not develop an attachment to either surrogate.