DrKalmagura Plans on Introducing a New Exam Review Procedure in His

Multiple Choice

Dr.Kalmagura plans on introducing a new exam review procedure in his chemistry classes.To check the effectiveness of the new procedure,he is going to have half his students try the new technique for one semester,while the remaining students review in the way they have always done in the past.He asks each student to decide whether they would like to use the new technique or the standard technique.What procedure is illustrated in this example

A)  a double-blind research design 
B)  informed consent in research 
C)  the use of non-random assignment 
D)  naturalistic observation