The Titanic is now an underwater shelter for marine life. It sank in 1912.
A. The Titanic, which sank in 1912, is now an underwater shelter for marine life.
B. The Titanic, that sank in 1912, is now an underwater shelter for marine life.
C. The Titanic, whose sank in 1912, is now an underwater shelter for marine life.
D. The Titanic, sank in 1912, is now an underwater shelter for marine life.

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