The answer is D, all of the above.
The following were required;
- Dependent Variable - productivity of workers
- Independent Variable - drinking the special juice
- Control group - Group B
<h3>What is a variable?</h3>
A variable is a measurable quantity that changes in an experiment. The variable that is manipulated in the experiment is called the independent variable.
Now these are the variables that are involved in this experiment:
- Dependent Variable - productivity of workers
- Independent Variable - drinking the special juice
- Control group - Group B
Learn more about experiment variable:brainly.com/question/16550062?
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sunlight helps in the process of photosynthesis,
Explanation:
photosynthesis is the process by which plants makes there own food using light in animals sunlight is important because it gives vimatin D which is responsible for strong born formation
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