The concept is most closely related with : B. Precedent
In legal term, precedent refer an action that is taken and set as an example or a guide in case of any similar event took place in the future
hope this helps
Answer: I think the answer is A.
Explanation: I think so because the sentence talks about the brain developing, which is changing.
Answer:
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<span>President Richard Nixon became the first U.S. president to visit Moscow in May 1972</span>
