Equilibrium quantity must decrease when demand:
- increases and supply does not change, when demand does not change and supply decreases, and when both demand and supply decrease.
- increases and supply does not change, when demand does not change and supply increases, and when both demand and supply decrease.
- decreases and supply does not change, when demand does not change and supply increases, and when both demand and supply decrease.
- decreases and supply does not change, when demand does not change and supply decreases, and when both demand and supply decrease.
Correct Answer: