Biology

Question

Although a corals' calcium carbonate shell is considered an exoskeleton, corals are

classified as invertebrates.

(A) NO CHANGE

(B) Although a corals calcium carbonate shell is considered

(C) Although a coral's calcium carbonate shell is considered

(D) Although a corals's calcium carbonate shell is considered

Answer

(C) Although a coral's calcium carbonate shell is considered

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The possessive form of the word "coral" is "coral's," so the correct answer is (C)...