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“Assiduous” denotes persistent, careful, and diligent effort. In academic settings, “assiduous note-taking” implies thoroughness, consistency, and attention to detail—exactly what supervisors value. Thus “diligent” (B) is the best match. “Sporadic” (A) means irregular or infrequent, the opposite of sustained effort. “Expedited” (C) refers to speed, not care; work can be fast yet sloppy. “Superficial” (D) emphasizes shallow engagement, clashing with “assiduous,” which implies depth. On Nelson–Denny items, positive evaluative verbs like “praised” cue a favorable trait; select synonyms that match the praise. Collocations help: “assiduous student,” “assiduous attention,” “assiduous research” commonly appear in expository prose. Create mental clusters (assiduous, sedulous, diligent) and opposing sets (lackadaisical, cursory) to cut down on deliberation. A substitution check—“praised for their diligent note-taking”—confirms semantic and tonal alignment. Recognizing evaluative context accelerates correct synonym selection under time constraints.