Final answer:
The demand curve for golf balls in the United States would shift from Demand A to Demand B if there is a change in consumer tastes away from golf and toward tennis.
Step-by-step explanation:
The demand curve for golf balls in the United States would shift from Demand A to Demand B if there is a change in consumer tastes away from golf and toward tennis. When consumer tastes shift towards tennis, the demand for golf balls will decrease as people will be less interested in purchasing them. This shift in consumer preferences is a factor that determines what quantity people are willing to buy at a given price, causing a shift in the demand curve.