The student describes her research project as one experiment. is this an accurate description?

a. yes, because the student was studying the factors that affect plant growth in all three pots.

b. yes, because the student was studying all three plants at the same time.

c. no; the student is performing two different experiments on the same dependent variable simultaneously using the same control but two different independent variables.

d. no; the student is performing three different experiments on the same dependent variable simultaneously using three different independent variables.