DrSullivan Is Conducting a Clinical Trial to Determine If Vitamin

Multiple Choice

Dr.Sullivan is conducting a clinical trial to determine if vitamin XX can improve test performance of students in an introductory college nutrition course.Dr.Sullivan puts all the students' names in a hat and draws names to determine if they will be placed in the control or the experimental group.The experimental group receives a capsule of vitamin XX and the control group a "sugar pill" that tastes and looks identical to the vitamin XX capsule.Neither Dr.Sullivan nor the participants know who is receiving which treatment.This experiment is best described as:

A) single-blind,randomized.
B) double-blind,placebo controlled.
C) single-blind,randomized,placebo controlled.
D) double-blind,randomized,placebo controlled.