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In formal scientific style (as on TEAS), data is treated as a plural noun taking plural verbs and pronouns: “data are.” Option B correctly uses plural these data are and maintains agreement in the independent clause (“the team will repeat”). Option A treats data as singular—common in informal usage but not preferred on exams. C mismatches demonstrative and verb (“This data are”) and also drops agreement in the second clause (“team repeat”). D pairs a plural subject with a singular verb (“data was”) and adds a comma error (missing comma after “therefore” when used as a conjunctive adverb within one sentence or, alternatively, should use a semicolon then comma: “; therefore,”). TEAS grammar items reward careful subject–verb agreement with collective and Latin-derived plurals: bacteria are, criteria are, media are (though “the media is” is creeping into modern usage). When unsure, substitute a clearly plural noun—“the results are”—to test agreement. Maintaining consistent formal style is crucial in professional documentation and research reporting.