Why did americans become more interested in foreign affairs in the late 1800s answers?

As the result of a conflict between british troops and a colonial militia in massachusetts

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 was the most explosive issue facing the united states prior to the start of the civil war?