Why did McCoy become a fireman?

Elijah McCoy, the noted black inventor, lived on this site for much of his adult life. Born in 1844 to fugitive slaves residing in Canada, McCoy was trained in Scotland as a mechanical engineer, and came to Michigan after the Civil War. Discrimination forced him to become a fireman on the Michigan Central Railroad. In 1872 McCoy patented his first automatic lubricating cup which oiled the locomotive while the train was in motion, thus eliminating frequent stops for oiling. He soon moved to Detroit were he improved his designs, and later setup a company to manufacture lubricators. These were installed in locomotives and steamships both here and abroad. McCoy died in 1929, honored for his important engineering innovations.

both B and C

Explanation:

plz mark brainliest

i believe the answer is: b. mr. head had a long, tube-like face with a rounded open jaw and a short depressed nose.

this is because in the un-revised sentence it said that mr. heads face was long and tube-like, and he had a rounded open jaw. this is not a very grammatically correct because of how it seems to drag on with the and, replaced with, with, makes it sound more fluent in the description.