Which of the Following Demonstrates How People Respond to Incentives

Multiple Choice

Which of the following demonstrates how people respond to incentives to make themselves better off?

A) More students major in economics when they hear that salaries for economists are rising.
B) Students are assigned dorm rooms through a lottery system.
C) Students are encouraged to donate blood because it is the right thing to do.
D) Students and faculty are encouraged to wear college apparel to support the college athletic teams.