The Successful Use of a Proxy Variable to Control for a Confounding

Multiple Choice

The successful use of a proxy variable to control for a confounding factor will allow you to accomplish all of the following except:

A) consistently estimate the treatment effect of interest.
B) limit the endogeneity problem associated with the confounding factor.
C) uncover the size of the semi-partial correlation of the confounding factor and the outcome.
D) conduct appropriate hypothesis testing for the treatment effect of interest.