You want to know if environmental conditions affect feeding behavior in rats. You conduct a study measuring the amount of food pellets rats eat when under the following experimental conditions: (lights off; in a cold room), (lights on; in a cold room), (lights off; in a warm room), (lights on; in a warm room). What type of statistical test should be conducted given the format of these data?
a. Correlation
b. Repeated measures ANOVA
c. Independent measures; Factorial (two-way) ANOVA
d. Independent measures; one-way ANOVA