Final answer:
Dopamine is involved in pleasure, while myelin is not related to sensation seeking.
Step-by-step explanation:
A. Dopamine is a neurotransmitter that plays a crucial role in the brain's reward and pleasure centers, making it a critical factor in how humans experience pleasure.
B. Myelin, on the other hand, is not a neurotransmitter but a fatty substance that forms a protective layer around nerve fibers. It helps in the efficient conduction of nerve impulses and is not directly involved in sensation seeking.
Therefore, the correct option is c. A is correct and B is incorrect.
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