Provide an Appropriate Response

Provide an appropriate response.
-A nutritionist wants to conduct a study to validate the efficacy of an herb as an aid in weight loss. She hires an
Experimenter to randomly assign half of a group of overweight persons to a treatment group who are given the
Herb with instructions as to use and a planned diet for six weeks. The other half of the group is given a placebo
With the same instructions and same diet. None of the participants know to which group they belong. The
Experimenter weighs each subject on Friday of each week. What type of blinding is being used?

A) double-blind
B) does not use blinding
C) single-blind
D) triple-blind