Which theory of color vision explains what happens in the optic pathways and in the brain after information leaves the eye?

Anoxia, one possible source of intellectual developmental disorder, involves brain damage resulting from:

A) ingestion of lead-based paint. B) lack of oxygen during or after delivery. C) poisoning from pesticides or fertilizer nitrates. D) seizures induced by inhalants or automobile exhaust fumes.

Omar can tie his shoes, but only with his mother's help. This suggests that tying shoes:

a. is beyond Omar's scope of capability. b. is within Omar's zone of proximal development. c. is an innate process that simply needs nurturing to unfold. d. is too difficult for a child his age and should not be attempted.