Harlow Presented Infant Monkeys with Two "Surrogate Mothers

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

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