Which of the Following People Is Most Likely to Change

Which of the following people is most likely to change her attitude?

A) Arlet, who gets paid $1 to help an experimenter recruit people for an interesting task
B) Ji-yoo, who gets paid $20 to help an experimenter recruit people for an interesting task
C) Mary, who gets paid $1 to help an experimenter recruit people for a boring task
D) Esme, who gets paid $20 to help an experimenter recruit people for a boring task