Your roommate is on an ultralow fat diet to try to lose weight. Given what you know about structure of the nervous system, what advice would you give him?
A. "You should eat some healthy unsaturated fats, like those found in fish, olive oil, and nuts, because your brain needs fatty acids to build the myelin sheaths around your axons."
B. "You should drink large quantities of water, because the brain is mostly water."
C. "You should eat trans fats, from donuts, because 'trans' is short for neurotransmission."
D. "Good for you! Losing weight by any means necessary can only help your brain."
Answer: A
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