Answer:The correct answer is D. his register. Register refers to the way in which a person speaks to different groups of people, taking into account the relationship, formality, and context of the situation. When speaking to five-year-old students, Oskar is likely using a more informal, child-friendly, and conversational tone than when speaking to their parents or school administrators, who would require a more professional and authoritative tone. This change in register reflects Oskar's understanding of the social and linguistic norms of each situation, as well as his awareness of the audience he is communicating with. By adjusting his register, Oskar is able to effectively communicate and connect with different groups of people, making his message more persuasive and effective.
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