When North Korea Invaded South Korea in 1950

When North Korea invaded South Korea in 1950,

A) Congress declared war before President Truman could formally request it.
B) President Truman asked for a declaration of war from Congress and received one.
C) President Truman asked for a declaration of war and was rebuffed by Congress.
D) President Truman sent American troops to Korea without asking for a declaration of war.
E) President Truman did not immediately send American troops to Korea because the Supreme Court justices ruled that it would be an unconstitutional use of presidential power.