People often went to revival meetings.
The correct answer is A.
During the late 1800's, America production was increasing greatly due to the development of interchangeable parts. Now that many businesses were able to mass produce goods, they needed buyers to consume them to ensure that the price of the goods did not decrease.
America wasn't worried about the spread of communism or the need for immigrant workers until the 20th century (hence why B and D are wrong).
Answer:
so that they can see if other tribes were coming to conker them.
Explanation: