Which type of people did the lowell factories hire? a) young boys b) young girls c) old women d) healthy men

Young girls

Primary sources are usually  more accurate and are written by someone who experienced it or witnessed it. secondary sources are those who heard of it after the fact that can lose details and or twist the event in a light that benefits them.

They had to go back and forth to the atlantic ocean and the pacific ocean to build the panama canal thats the best i can answer