Answer:The control sample or the control group is a name given to a group of samples that are not treated with anything. They are left as it is. In this experiment, Dr. Lina Reyes wants to determine the effect of additional nitrogen to the fertilizer to the growth of the plants. Group B, which was given with fertilizer but without additional nitrogen is the control group. The Group A which was treated is the experimental group.
Step-by-step explanation: