Whose Behavior Is Most Likely to Show the Greatest Resistance

Whose behavior is most likely to show the greatest resistance to extinction?

A) Carlos, who gets everything he asks for from his grandparents when they are out shopping
B) Lydia, who is always told ''No, we cannot afford that'' by her parents when they are out shopping
C) Kaitlyn, who does not ask for anything from her grandparents when they are out shopping
D) Rick, who sometimes gets what he asks for from his parents when they are out shopping