The Study by DeLuca and Holborn Showed How the Physical

The study by DeLuca and Holborn showed how the physical condition of obese boys could be improved. The study used a __________ design and included __________.

A) multiple baseline; a withdrawal of treatment
B) A-B-C-B; period of noncontingent reinforcement
C) changing criterion; a withdrawal of treatment
D) alternating treatments; multiple baseline