By changing _____, we can create about a million (or more) ...

[SO00]

By changing _____, we can create about a million (or more) discriminable colors.
 
  A) saturation only
  B) value only
  C) hue and saturation, but not value
  D) saturation, value, and hue

Question 2

In the research by Brendl, Chattopadhyay, Pelham, and Carvallo (2005) on preference for letters of one's own name, the participants drank two teas, one that contained letters of their own name and one that contained letters of another person's name. This systematic variation, which was created by the research, means that the research was which of the followingt?
 
  a. Observational research
  b. Correlational research
  c. Experimental research
  d. Applied research

[TDubDCFL]

Answer to Question 1

D

Answer to Question 2

c