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 primary source because it is a firsthand account of the event from someone who experienced it.
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an interview with a crew member published in a major newspaper - This is also a primary source as it provides original testimony from someone directly involved in the event.
The other options are secondary sources because they interpret or analyze the event rather than provide firsthand accounts.