upon what is a treatment applied?\n○ the expl...
upon what is a treatment applied?\n○ the explanatory variable\n○ the subject\n○ the response variable
Answer
# Brief Explanations:
In an experiment, a treatment is applied to the subject. The explanatory variable is what the researcher manipulates and the response variable is what is measured as a result of the treatment. The treatment is not applied to the variables themselves but to the entity (the subject) on which the variables are observed.
# Answer:
the subject