In a famous series of experiments conducted by harry harlow, infant monkeys were separated from their mothers at birth. the infants were then given two surrogate mothers (a terry-cloth "mother" and a wire "mother"), each of which alternately had a nursing bottle that provided food to the infants. the experimental results showed that in frightening situations the infant monkeys

a. were more likely to become aggressive toward the wire mother than toward the terry-cloth mother
b. preferred the wire mother, even when the terry-cloth mother had the nursing bottle
c. preferred the terry-cloth mother, even when the wire mother had the nursing bottle
d. would run and cling to whichever mother had the nursing bottle