Generally speaking, objective historians behave in all of the following ways except that "<span>D. they interpret the evidence according to their personal beliefs and values" since this is not being objective.
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Answer:
Less than 50% of Americans.
Explanation:
"a. While it was actually built over many dynasties, to keep out <span>invaders, the greatest construction began during the Qin Dynasty" would be the best option, since it took many years for the wall to be completed and effective against invaders. </span>