Question

a farmer wants to compare the effects of a new fertilizer to his current fertilizer on his crop of butter beans. one year, he fertilized \\(\frac{1}{4}\\) of his crop (a) with the new fertilizer, \\(\frac{1}{4}\\) of his crop (b) with the fertilizer he had used in the past, \\(\frac{1}{4}\\) of his crop (c) with a mixture of the two fertilizers, and \\(\frac{1}{4}\\) of his crop (d) with no fertilizer. assuming all other factors - sunlight, rainfall, soil composition, etc. - are the same as in previous years, what is the control group in this experiment?\
a group c\
b group d\
c group a\
d group b

Explanation:

In an experiment, the control group is the one not exposed to the independent variable (here, fertilizer). Group D has no fertilizer, so it's the control to compare with groups using fertilizers.

Answer:

D. Group D