The main function of the president’s cabinet is

Established in Article II, Section 2 of the Constitution, the Cabinet's role is to advise the President on any subject he may require relating to the duties of each member's respective office.

Explanation:

supplies had to travel a long distance across water on ships that were often attacked, so they did not reach europe

b.

explanation:

he is racist

"oh, lets coppy china and build a great wall around bla bla bla.that way,we wont lose out to other countries." in the end, he did not build anything