I'm sorry if this isn't right but from what I learned it's the first one :)
<span>The OWM supervised OES, war production Board, and other agencies. Hope this helps :)</span>
Answer:
B, indentured is the correct answer
Answer:
Well based on the fact that the very first patented rock crushing machine was made in the year 1830, and the first successful, Eli Whitney Blake's, was in 1858, I'd say the development process was around 30 years.