According the Research Involving Playing a Game to Earn Puffs

Multiple Choice

According the research involving playing a game to earn puffs of a cigarette or dollars, smokers would play the game for

A) dollars if the game was easy.
B) puffs of a cigarette is the game became difficult.
C) dollars whether the game was easy or hard.
D) puffs of a cigarette if a lit cigarette were present in the room even if the game was hard.