Which of the following was NOT mentioned in the passage

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Which of the following was NOT mentioned in the passage as a source of information for The Sea Around Us?

printed matter

talks with experts

a research expedition

letters from scientists

Giải thích

Đáp án C
Thông tin ở những câu gần cuối đoạn 2: Carson consulted no less than 1,000 printed sources. She had voluminous correspondence and frequent discussions with experts in the field.
Chỉ có C là không được nhắc đến