A research team looks at the impact of the color of a room (blue vs. green) and scent of a room (good scent, no scent) on customer purchasing decisions and finds that color of room impacts purchasing decisions but only when the room smells good. When the room does not smell good, color has no impact on purchasing decisions. The impacts of color and scent on purchasing represent a(n):
A. main effect
B. interaction
C. mediation
D. regression effect
