In an experimental design, the tests and control groups are taken to perform the experiment. To test the effectiveness of fertilizer the control group the plant will not be given any fertilizer. Thus, option A is correct.
A control group is the part of the experimental design that separates the other factors from the groups. The independent variable of the experiment cannot influence the control group and is compared to the experimental or the test group.
In a control group, the object to be tested are given the standard doses or placebo or even maintained in just normal conditions without any drugs, medications, or factors.
In the experiment testing the effect of the fertilizer on the plant species, the control group must not be given anything as it will be used to compare to the test group where the plant will be subjected to fertilizers.
Therefore, option A. the control group will not be subjected to fertilizer is correct.
Learn more about the control group here:
https://brainly.com/question/14198712
#SPJ2
