Correct option is B
Option (b) is the correct order of the given sentences.
Correct Sequence: BCDA
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B: Introduces the main topic—Covid-19 affecting all sectors.
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C: Narrows down to one specific sector—education.
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D: Provides details about teachers' challenges.
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A: Concludes the impact on other professions.
Structure Tip: Start with general → then specific → supporting details → broad closure.