The United States maintained neutrality up until the point where Japan bombed Pearl Harbor. After that, it was impossible for the US to keep to itself.
Answer:
A dollar diplomacy was 'the use of a country's financial power to extend its international influence.' and Moral diplomacy was is the system in which support is given only to countries whose beliefs are analogous to that of the nation.
The answer to your second question is D.) Welfare
The civil service reform act of 1978 is intended to provide Federal managers with the flexibility to improve Government operations and productivity while, at the same time, protect employees from unfair or unwarranted practices.