Explain what evidence is most useful when making predictions. Provide an example of what that evidence might be. but the example

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 are the major problems with a command economy?

Brainliesttt !me : ) -what is invisible warfare?