If automobile workers went on strike causing a decreased supply of cars, the supply curve would shift inward to the left, and
a. there would be an eventual downward movement along the demand curve, reestablishing equilibrium
b. there would be in eventual upward movement along the demand curve, reestablishing equilibrium
c. the demand curve would eventually shift to the right, reestablishing equilibrium
d. the demand curve would eventually shift to the left, reestablishing equilibrium