Rejections of Unfair Offers in the Ultimatum Game Are More

Rejections of unfair offers in the Ultimatum Game are more usually prompted by emotions:

A) of withdrawal such as disgust, than by emotions of approach such as anger.
B) of approach such as anger, than by emotions of withdrawal such as disgust.
C) of high intensity , than by emotions of low intensity.
D) that are social in nature, such as embarrassment or shame, than by non-social emotions.