Read the alternative hypothesis that is stated next. Then, answer the questions that follow, which relate to the stated alternative hypothesis. Alternative Hypothesis: High school chemistry students who participate in a standard chemistry curriculum that is augmented with intelligent computer- based chemistry tutors will demonstrate higher chemistry achievement, as measured by higher scores on a standardized achievement test, when compared to students receiving only the standard chemistry curriculum. Which one of the following items best describes the independent variable in the alternative hypothesis stated above? O high school chemistry curriculum O science achievement O intelligent computer-based chemistry tutors O high school chemistry students O standard science curriculum