What american invention to increase cotton production?

In an effort to end the civil war, in 1864 the union planned to

Which of the following world and national events led to a new view of people with disabilities in the us:     a.  world war i and ii veterans with disabilities returned home after the wars.b.  john f. kennedy was elected president and had a sister with a disability.c.  the civil rights and feminist movements.d.  all of the above.

What factor aided the russians in defeating napoleon's troops?