A increase in demand coupled with a simultaneous and bigger decrease in supply will cause equilibrium:

Question

Quizplus · Accepted Answer

An increase in demand will result in a rightward shift of the demand curve, whereas a decrease in supply will cause a leftward shift of the supply curve. If the decrease in supply is larger than the increase in demand, then the equilibrium price will increase, but the equilibrium quantity will decrease. Overall, the market will experience a shortage, leading suppliers to raise their prices while still selling less. This is represented by choice A.

A Increase in Demand Coupled with a Simultaneous and Bigger