The Basic Purpose of the Other-Things-Equal Assumption Is to

Multiple Choice

The basic purpose of the other-things-equal assumption is to

A) allow one to reason about the relationship between variables X and Y without the intrusion of variable Z.
B) allow one to focus upon micro variables by ignoring macro variables.
C) allow one to focus upon macro variables by ignoring micro variables.
D) determine whether X causes Y or vice versa.