In a study examining the effect of room illumination (low, medium, high) and room temperature (cold, warm, hot) on test performance, how many interactions are possible?

A) 1
B) 2
C) 6
D) 9

Interactions

The influences or impacts that different factors may have on one another within an experimental or observational study.

Room Illumination

The level or intensity of light in a room, which can affect mood, performance, and visual clarity.

Room Temperature

The ambient temperature that is considered comfortable for humans, typically around 20-22 degrees Celsius (68-72 degrees Fahrenheit).