A controlled experiment is B. An experiment with one dependent variable and one experimental variable.
What is the controlled experiment?
In experiments, researchers manipulate impartial variables to test their effects on established variables. In a managed experiment, all variables aside from the impartial variable are controlled or held steady so that they do not impact the structured variable.
A very good example could be a test to test drug effects. The sample receiving the drug would be the experimental institution whilst the pattern receiving a placebo will be the management institution. At the same time as all variables are stored similarly (e.g. age, sex, etc.) the only distinction between the agencies is the taking of medication.
Learn more about the controlled experiment here https://brainly.com/question/14839352
#SPJ2
