A major response to the emergence of capitalism in the U. S. was an increase in

А. agriculture and animal husbandry

B
monarchs and aristocrats

С
ethnic suspicion, religious rebellion, and cultural separation

D
organized labor, transportation, and government regulation

answer: the time zones used to be whatever the local authority wanted them to be. one town might have 6am whenever the sun came up and another town had 6am 10 minutes later.  

the trains had a hard time when their orders said to be at a certain point at 6am.  

6am, but who's 6am.  

the railroads got together and set the time zones more or less along the longitude lines across the country.

explanation:

i think the answer is   b.

i might not be much but i think its c