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Pay close attention to the directional words "no," "although," and "in truth." "Although" suggests a turn in the sentence; the teacher had to "maintain the appearance of," or pretend to be, "an authority figure," while, in reality, she was "no" strict person. Both a "stickler" and a "disciplinarian" are strict people, so these are the correct answer choices. "Educator" and "scholar" are words that are associated with teachers, but they don't mean strict. A "luminary" is a prominent and inspiring person, but there is no evidence in the sentence that the teacher is such a person. "Delinquent" is also not a good match for strict.