Which of the Following Is Not an Explanation for Why

Which of the following is not an explanation for why people in a positive mood are more susceptible to persuasion?

A) A positive emotional state is distracting, making evaluation of arguments difficult.
B) A good mood makes you feel that all is well, and you don't work as hard to evaluate arguments.
C) Happy people want to preserve that mood, so they don't want to ruin it with critical evaluation of information.
D) A positive mood makes people more thoughtful, so they are more likely to engage in central processing.