20.

24. (A) The sanctuary is the first in Lake Michigan and only the second in the Great Lakes. (B) But as archaeological resources, the wrecks have limited time. (C) The Vernon’s fate was not unusual. (D) Not all of them died in wrecks； some were felled by other occupational hazard, like falling from masts. (E) Inside are wooden chalices stacked inside crates, bottles of wine, barrels of potatoes and apples, according to researchers.

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