Explain the historical circumstances that led to the use of the use of machines described in the letter.

c is the answer for this

the secretary of state, appointed by the president with the advice and consent of the senate, is the president's chief foreign affairs adviser. the secretary carries out the president's foreign policies through the state department and the foreign service of the united states.

no because it could make the world a terrible place to live in.

answer; mental health prevention programs;