A comprehensive survey released by a college reports that the true proportion of all students at the college who use drugs is 0.3.You survey 100 students in your dorm and record that the proportion of students who use drugs is 0.15.The proportion of all students at this college who use drugs is a _________ and the proportion of students who use drugs in your dorm is a _________.

A.population;sample

B.parameter; statistic

C.statistic;parameter

D.variable;summary measure