If we are interested in testing whether the proportion of items in population 1 is larger than the proportion of items in population 2, the Select one: a. alternative hypothesis should state p1 - p2 > 0. b. alternative hypothesis should state p1 - p2 < 0. c. null hypothesis should state p1 - p2 > 0. d. null hypothesis should state p1 - p2 < 0.