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.

[Q]: Category: ENTERTAINMENT HISTORY
Clue: Originally known as the Missouri Rockets, they performed at the opening of an East Coast theatre in 1931
[A]: the rockettes

[Q]: Category: PRESIDENTIAL ELECTIONS
Clue: The only 2 Democratic presidents defeated for reelection since the Civil War
[A]: grover cleveland & jimmy carter

[Q]: Category: FAMILIAR PHRASES
Clue: This 5-word rule or maxim has been attributed to both H. Gordon Selfridge & John Wanamaker
[A]:
the customer is always right