The exposure that has been received by both the experimental group and the control group is from the same confounding variables. Hence, Option C is correct.
A variable is something that is concerned with all the things like characteristics, numbers, or quantities that can be measured or counted. In the context of computer programming, it is the variable that is at the abstract storage location and is paired with an associated symbolic name.
This variable is something that contains some known or unknown quantity of information. In other terms, the variable can be called a container for a particular set that contains bits or types of data. Variables are the data item that consisted of the business income and expenses, country of birth, capital expenditure, class grades, and many more.
Thus, Option C is correct.
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