Every Variable Should Have an Important Attribute of Being Exhaustive

Multiple Choice

Every variable should have an important attribute of being exhaustive. For the variable to be useful in research, researchers must be able to classify every observation in terms of one of the attributes composing the variable. Being exhaustive means that the researcher should be able to classify _____.

A) each and every possible observation
B) each and every desirable observation.
C) each and every needed observation.
D) each and every certified observation.