Under president obama, there are about 500 members of the who serve as close, personal advisers to the president and are not subject to senate confirmation.

white house staff_ are the member under US president who serve as close, personal advisers to the president

Explanation:

_white house staff_ are the member under US president and they are in 500 numbers who serve as close, personal advisers to the president and they does not need any confirmation from senate.

white house staff include member like, vice president, senior adviser, assistant to president, secretary to the president, secretary of the state, attorney general, acting chief of the staff, acting defense secretary, CIA director etc.

the answer is

a) revise existing treaties

b) do away with political alliances

c) prevent the spread of communism

d) bring an end to european colonization

the main goal of the southeast asia treaty organization was to prevent the spread of communism in southeast asia.