Harry Harlow Presented Infant Monkeys with Two "Surrogate Mothers

Harry Harlow presented infant monkeys with two "surrogate mothers." One was a bare wire cylinder with a feeding bottle,whereas the other was a wire cylinder covered with soft terry cloth that had no feeding bottle.The results of his experiments revealed that:

A) infant monkeys became attached to the bare wire mother.
B) infant monkeys became attached to the terry cloth mother.
C) infant monkeys did not become attached to either mother and showed strong symptoms of anxiety.
D) some monkeys became attached to the bare wire mother,whereas others became attached to the terry cloth mother.