What were the three major professions the people took out on the
western frontier following the conclusion of the civil war?

Transcontinental Railroad workers

Mining

Farming

Explanation:

Transcontinental Railroad workers resulted in growth

Mining, copper, lead, tin, quartz, & zinc ultimately more profitable than gold or silver. Corporations gradually came to dominate mining

Farming, cattle raising, Land given away to encourage settlement of West and to develop the family farm.

they believed democracy was worth the fight

i am not 100% positive but i think it is is b. both are non-partisan jobs

i am pretty sure that members of congress have term limits, can be impeached, and are nominated through direct popular vote.