PLEASE HELP ILL GIVE A CROWN! which of the following best describes mass production ?

A ) Cotton Gin allowed for more cotton to be processed at a cheaper price.
B ) Hand-made clocks from Germany were a one of a kind gift.
C ) Lowell Textile Mills had dormitories for their workers so they didn't need to leave the factory.
D ) Need for a large cheap labor source decreased with the invention of the steel plow.

Which is the best conclusion that can be drawn regarding the status of african-americans in the south in the late 1800s? a) african-americans made tremendous political, social, and economic advancements during the reconstruction era. b) passage of the 13th, 14th, and 15th amendments to the u.s. constitution guaranteed equal status and rights for all african-americans. c) the reconstruction policies enacted by the federal government were highly effective in african-american citizens transition to life after slavery. d) although african-americans had equal rights under federal law they were still economically, politically, and socially inferior to whites in the south during the reconstruction era.