A student hypothesizes that high school students that consume different flavors of a drink before a spelling test will perform differently. A study to test the hypothesis finds that with a bitter drink, performance is best 6 hours after drinking it, whereas with a sweet drink, performance is better 1 hour after drinking it. Which of the following are the independent variables?
a. test scores and high school students
b. test scores and time of consumption
c. flavor of drink and time of consumption
d. flavor of drink and high school students
e. flavor of drink and test scores
Ans: c. flavor of drink and time of consumption
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