A) Robert R. Lee and i'm almost 100% positive mark me brainlest
After the Battle of Antietam in 1862, President Abraham Lincoln announced his intention of freeing all slaves in the Confederacy.
<span>They could not participate in an abolitionist meeting</span>
Answer:
Interchangeable parts, popularized in America when Eli Whitney used them to assemble muskets in the first years of the 19th century, allowed relatively unskilled workers to produce large numbers of weapons quickly and at lower cost, and made repair and replacement of parts infinitely easier.
Explanation:
A. The opportunity to establish the US as a Military power :)
