A farmer wants to know the effects of a new fertilizer on his crop of butter beans. One year, he fertilizes
1
4
of his crop (A) with the new fertilizer,
1
4
of his crop (B) with the fertilizer he has used in the past,
1
4
of his crop (C) with a mixture of the two fertilizers, and
1
4
of his crop (D) with no fertilizer. Assuming all other factors - sunlight, rainfall, soil composition, etc. - are the same as previous years, what is the control group in this experiment?
A)
Group A
B)
Group B
C)
Group C
D)
Group D
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