B. Please choose the BEST answer to complete each sentence.
11. Hawaii has been trying to keep critical parts of its ocean clear of marine ______, removing 57 tons of it from the Northwestern Islands in 2014.
(A) food
(B) biology
(C) debris
(D) boats
(E) animals

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統計： A(0), B(8), C(63), D(0), E(5) #2055378

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