Scarcity

Scarcity:

A) is an effective influencer because people want to avoid any feeling of regret over missing out on something.
B) is a principle of influence that indicates how people are influenced by showing how their previous statements fit with a request.
C) is an effective influencer because people often look for some kind of external validation before they make a decision.
D) is a principle of influence that states people are more likely to want to do something if they believe that many others are buying the same product.