Vermont-based Green Mountain Coffee Roasters dominates the market for single-serve coffee in the United States, with its subsidiary Keurig accounting for approximately 70% of sales ("Rivals Try to Loosen Keurigs Grip on Single-Serve Coffee Market," Chicago Tribune, February 26). But Keurigs patent on K-cups, the plastic pods used to brew the coffee, is expected to expire this year, allowing other companies to better compete. Suppose a potential competitor has been conducting blind taste tests on its blend and finds that 47% of consumers strongly prefer its French Roast to that of Green Mountain Coffee Roasters. After tweaking its recipe, the competitor conducts a test with 144 tasters, of which 72 prefer its blend. The competitor claims that its new blend is preferred by more than 47% of consumers to Green Mountain Coffee Roasters French Roast. Which of the following should be used to develop the null and alternative hypotheses to test this claim?

a) Ho:p0.47,HA:p<0.47Ho:p0.47,HA:p<0.47

b) Ho:72,HA:<72Ho:72,HA:<72

c) Ho:p0.47,HA:p>0.47Ho:p0.47,HA:p>0.47

d) Ho:p=0.50,HA:p0.50Ho:p=0.50,HA:p0.50