Step 1: Define the kinds of validity.
- Content validity (a.k.a. logical/face validity in many texts) checks whether the items cover the full domain of the construct—typically via expert judgement and blueprinting the content domain.
- Construct validity asks whether the measure behaves as the theory predicts (convergent/discriminant).
- Criterion validity asks whether the measure correlates with an external criterion (concurrent/predictive).
Step 2: Match to the stem.
The stem stresses “subjective but systematic evaluation of representativeness of the content.” That is exactly content validity.
Step 3: Eliminate alternatives.
(a) & (c) involve statistical/theoretical relationships, not item representativeness; (d) concerns reliability (internal consistency), not validity.
\[
\boxed{(b)}
\]