Who is the most important thing in the work a. kind. b. helpful
c. graceful. d. have a strong combination
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probably D

Explanation:

it seems like the smartest answer and what i would answer

2. a land bridge connected asia and north america thousands of years ago.

4. crossing the land bridge would have been simple for the first migrants.

5. people might have crossed a land bridge while hunting animals.

independent innovation during the abbasid caliphate