When Sperry cut a newt’s optic nerve and turned the eye upside down, what happened?

a. Axons of the optic nerve grew randomly and attached diffusely to target cells in the tectum.

b. Axons of the optic nerve grew back to their original targets.

c. Axons of the optic nerve grew back to targets appropriate to their new location in the eye.

d. At first the axons grew back randomly, but then they established appropriate connections by learning.