The two correct answers that are considered primary sources about the sinking of the Titanic are:
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a memoir written by one of the survivors of the shipwreck - This is a firsthand account from someone who experienced the event directly.
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an interview with a crew member published in a major newspaper - This is also a firsthand account, providing direct testimony from someone involved in the event.
The other options are secondary sources since they analyze, summarize, or interpret the events rather than providing direct evidence.