Scan the information in the primary source Minnesota in 1870 and then answer the questions that follow part B what is the purpose of this document?

The answer would be B.

Explanation:

I've studied this quite a bit and the wind would change direction and kill troops, or even some civilians. The average soldier would get paid 20 silver bits to mess with poison gases because if it misfires, or the wind changes direction and kills people that aren't the enemy their job could be taken and could get a nice cozy death sentance.