What is the theory that explains how large pieces of earth's outermost layer move and change shape

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.

Even though the u.s. declared neutrality, who did most americans side with in wwi?

Who intended to write an epic poem 12 books long