I would say it's the Historian because they study history or the past and have to interpret it so they can figure out how to teach it or stop it from happening again.
B
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Letter B is the answer for this question
Answer:
Before the rain; the clouds turned dark gray.
Explanation:
For it to be properly worded<em>, </em>it would be <em>" Before the rain, the clouds turned dark gray " </em><em>or </em><em>" The clouds turned dark gray </em><em>before </em><em>the rain ". </em>
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<em>p.s. </em>
<em>the other answer explains it a bit clearer, showing to remove the " ; "</em>