One Aspect of Purchasing from QVC, One of the Cable

One aspect of purchasing from QVC, one of the cable shopping channels on television, is that the "offer" will expire within a certain amount of time, creating a sense of urgency among consumers. Teresa watches this channel frequently and admits that this aspect of the situation does influence her decision to buy something. Which characteristic of the situation is influencing Teresa and others' behavior?

A) physical surroundings
B) social surroundings
C) temporal perspective
D) task definition
E) antecedent states