Does exercise improve memory? To investigate the question, a researcher recruits a group of people who participate in rigorous exercise (e.g; running) 5 or more times per week, a group who participates in moderate exercise (e.g; walking) 3-5 times per week, and a group who does not exercise regularly. Each participant is given a battery of memory tests and is assigned a memory score on a scale from 0-100. What type of test should be used to analyze these data?

a. paired-samples t test

b. one-way between-groups ANOVA

c. two-way between-groups ANOVA

d. independent-samples t test