Medical authorities announced in the late 1980s that an acne medicine named Retin-A also had previously unknown wrinkle-reducing properties. What would an economist expect to happen to the price and quantity of Retin-A sold after this announcement? Select one: O a. The price would have fallen and the quantity sold would have risen. O b. The price would have risen and the quantity sold would have fallen. O c. The price and quantity sold would have both risen. O d. The price and quantity sold would have both fallen