In an Experiment, People Rated How Funny They Thought Cartoons

Multiple Choice

In an experiment, people rated how funny they thought cartoons were while holding a pen crosswise in their mouths.Those who held the pen in their teeth thought the cartoons were funnier than did people who held the pen in their lips.These results are best explained by the

A) experimenter effect due to a self-fulfilling prophecy that was created by the cartoon.
B) placebo effect.
C) attribution theory.
D) pen between the teeth causing the subjects to smile and the pen between the lips causing them to frown.