You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: BLACK AMERICAN HISTORY 
Clue: This organization was founded in 1944 after Tuskegee's president suggested pooling schools' money
united negro college fund

Category: SLOW DOWN 
Clue: Cinematic effect achieved by filming at faster than projection speed
slow motion

Category: BRAINBUSTERS 
Clue: 2 of the 3 U.S. presidents in the 20th century named William

mckinley, taft &/or clinton