Why Is It Recommended That a Researcher Choose to Use

Multiple Choice

Why is it recommended that a researcher choose to use a measure that has been used before?

A) It isn't. The research has already been completed, so there is no point in using a measure that has been used before.
B) It is the only measure available for the age group in question.
C) Measures that have been used before have credibility and the researcher can support his choice by citing previous use in other research studies.
D) Measures that have been used previously do not require special training.