The portion of the brain responsible for conscious thought, reasoning, and abstract mental functions is the:
a. cerebrum
b. cerebellum
c. cerebral cortex
d. corpus callosum

The correct answer is A. The portion of the brain responsible for conscious thought, reasoning, and abstract mental functions is the cerebrum.

Explanation:

The cerebrum is part of the central nervous system and comprise most of the human brain. The cerebrum processes impulses from sensory nerve cells and regulates voluntary movement. It is also the place where cognitive and emotional processes (including logical reasoning, planning, memory, emotion) take place.

the answer is d (apex) good luck : ))