Can the type of music that is playing in the background have an impact on the taste of wine? In an experiment conducted in Scotland, 200 adults volunteered to take part in a wine tasting. Each adult was assigned at random to one of four rooms. The rooms all looked the same, but a different type of music (classical, country, rap, or rock and roll) was being played in each room. While in their assigned room, the adults were asked to taste and rate a glass of cabernet sauvignon wine. Those adults who were listening to classical music while tasting the wine rated the wine more positively than adults listening to country, rap, or rock and roll music. How many treatments does this experiment have?

A. One

B. Two

C. Three

D. Four

E. More than four