The answer is <span>B. protest the Vietnam War.</span>
Answer:
In colonial America, slaves from west Africa made many a plantation owner rich by growing a particular high-quality variety of rice. Now, genetic research suggests the slaves not only supplied the labor and the agricultural skills they'd gained in their home countries but also may have brought the valuable crop with them.
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<span>flood control
military</span>
Answer:
Most casualties and deaths in the Civil War were the result of non-combat-related disease. For every three soldiers killed in battle, five more died of disease.