Which of the Following Conditions Distinguishes Double Blind Studies Used

Multiple Choice

Which of the following conditions distinguishes double blind studies used in health research?

A) Neither the members of the control group or the experimental group nor the person administering the treatment knows who is receiving the experimental therapy.
B) Both groups of research subjects and the person administering the treatment know who is receiving the experimental therapy.
C) The research subjects do not know, but the person administering the treatment knows who is receiving placebo or standard therapy.
D) Only members of the control group know they are receiving standard therapy.