As Part of Research Study, a Researcher Decides That She

Multiple Choice

As part of research study, a researcher decides that she will use the number of pieces of junk mail that a family receives each week as an indicator of how wealthy the family is. If we do not have a good reason to believe that these two things are related, her measure of family wealth is

A) unreliable.
B) not valid.
C) unstandardized.
D) multidimensional.