Expensive Commercial Courses Have Long Been Promoted to Teach People

Multiple Choice

Expensive commercial courses have long been promoted to teach people to walk barefoot on hot coals through a technique called "neurolinguistic programming." Physicist Bernard Leikind was able to show that anyone with reasonably callused feet can walk over a bed of coals because he

A) conducted a large scale survey to determine the extent of firewalking and how people accomplished this feat.
B) conducted case studies of various circus performers who routinely walked on hot coals.
C) performed a correlation study regarding the thickness of the skin on the sole of the foot to the person's ability to walk on hot coals.
D) provided a comparison group made up of volunteers who walked on the coals with no training.