Which of the Following Is Not True

Which of the following is not true?

A) An extensive form representation usually provides more information than a normal form representation of a game.
B) A normal form game is most useful for sequential-move games.
C) The notion of perfect equilibrium is more useful in analyzing extensive form games than normal form games.
D) The notion of credible threats makes more sense in extensive form representations than in normal form representations of a game.