Construct Validity Is BEST Defined as the Extent to Which

Construct validity is BEST defined as the extent to which

A) participants who are tested repeatedly on the same measure will yield the same results.
B) the participants in a study were subjected to both random assignment and random selection.
C) results in a study can be achieved upon repeated administration of the same measuring instrument.
D) measures used in a study really measure the conceptual variables they were designed to measure.