A student believes that a beverage improves memory. Two groups of students will be given a beverage before they take a test in class. Which of these is the best way for the student to design the experiment?

The best way to design the student's experiment is to let the first group drink the beverage before the exam, while the second group won't. It must be the same kind and type of beverage to be used for each student. Also, the two groups of student must be on the same grade level and would take the same test.