If the Most Appropriate Measure for the Type of Data

If the most appropriate measure for the type of data you wish to collect has not yet been validated the best course of action is to:

A) Use the measure that most closely mirrors the ideal measure
B) Use anecdotal information to collect what you need.
C) Use the measure anyway, systematically collecting data using a measure is part of the process of validation.
D) Do not include this information in your research design if an ideal validated measure is not available