Which word does the author use in the first sentence to present heat waves as a problem?
What evidence does the author include to support the
idea that heat waves are a problem?

Cwould be the answer

The transcontinental railroad provided a means of fast transportation. it cut a 6 month trip into 6 days, created jobs for many people and encouraged immigration. the homestead act played a huge role in western expansion; it allowed settlers to begin a fresh start, and gave them land in exchange for their residence for up to five years and a small fee.

The answer is c because if a country do that than exports will decrease