Answer:
C - an explanation of an abstract concept that is specific enough to allow a researcher to measure the concept.
Explanation:it is referred to as the explanation given bu the members or participant over any topic that is enough to be understood by the listeners. The operation may be considered as an idea that can have a huge impact on production, the management or any practice, etc.
operational is considered to be the procedure that the researcher uses in order to get the best result from it.