"a. Most Americans still lived on farms, even though cities were booming" and "<span>b. Thousands of children worked from sunup to sundown—and a few people began to pay attention" </span>would both be correct. This is what led to the unions.
D. He was a double agent who brought Lafayette info about the british
The development of spoken language might have influenced the religious beliefs of Stone Age people, as <span>B. Spoken language would have allowed religious beliefs to spread more quickly. Although the spoken language may have made people more suspicious of outsiders, it would not necessarily mean that that suspicion would influence their religious belief, so not A. Although spoken language would eventually create a new class of religious leaders, it would probably not have influenced everybody, as not all people would have the same amount of articulation, so not C. And not D, as cave paintings would have been a form of visual communication.</span>
I think it would be the third choice
Maize was not brought to America
