There Is a Relationship Between the Amount of Fire Damage

Multiple Choice

There is a relationship between the amount of fire damage (dependent variable) and the number of trucks responding to the fire (independent variables) . It is a positive relationship. If one controls for the size of fire, however, this original relationship will decrease or disappear. This is an example of using which procedure:

A) Holding an extraneous variable constant
B) Causal modeling
C) Statistical control
D) Matching