Doctors wonder whether the time an antidepressant is taken has any impact on its effect. They instructed 7 patients to take the pill 30 minutes before each meal, another 7 patients to take the pill with their meal, and 8 patients to take the pill 8 minutes after each meal. Which type of statistical test should they use to analyze the data?

A. Single sample t test

B. Simple linear regression

C. Paired samples t test

D. One-way ANOVA

E. Independent samples t test

F. Pearson's r correlation

G. Z test