To test at 5% level of significance whether the true proportion of the interested students is signinificantly different from the known proportion. The appropriate hypothesis test is: A. H: 1 = 0.8 versus HA:n # 0.8 B. Ho: n = 0.82 versus HA:n + 0.82 C. Ho: It = 0.8 versus HA:p + 0.82 D. Ho: p = 0.82 versus HA:p