<h2>D is the most logical answer</h2>
Answer:
The set of pepper plants in the fourth box are the control group
Explanation:
The aim of the experiment is to determine the plant fertilizer that will give the most pepper yield
The number of types of fertilizers used under the study = 3 brands
The number of boxes set up for the experiment = 4 boxes
The number of pepper plants planted in each box = 3 sets
The fertilizers applied to each box = One different type for each of the first three box
The type of fertilizer applied to the fourth box = No fertilizer
The control group is the group to which the effect of the other groups subject to the experimental treatment are compared, and the group not subject to the treatment of the experiment.
Therefore;
The set of pepper plants in the fourth box are the control group.
Creating a testable hypothesis comes after the development of a research question in the scientific method.
<h3>What is the scientific method?</h3>
A scientific method is a process of conducting experiments that is mainly used to analyze the observations and answer the questions.
The scientific method involves a series of steps to conduct an experiment. The steps are listed as follows:
- Ask a question.
- Develop research questions after a background check.
- Create a hypothesis.
- Test your hypothesis by doing an experiment.
- Investigate the data and draw a conclusion.
- Share the results of the observation.
Hence, the correct option is D.
Learn more about the scientific method here:
brainly.com/question/7508826
