In humans, what crosses to the contralateral hemisphere at the optic chiasm? A. Half of each optic nerve, the part representing the nasal half of the retina B. Half of each optic nerve, the part...

In humans, what crosses to the contralateral hemisphere at the optic chiasm?
A. Half of each optic nerve, the part representing the nasal half of the retina
B. Half of each optic nerve, the part representing the temporal half of the retina
C. Half of each optic nerve, originating from random parts of the retina
D. All of each optic nerve