15. Which of the following can be concluded about wild sheep, as compared with domestic sheep?
(A) They are evolving more rapidly.
(B) They have thicker coats.
(C) They are of less economic importance.
(D) They are less similar to bighorn sheep.
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統計: A(1), B(3), C(2), D(3), E(0) #801738
統計: A(1), B(3), C(2), D(3), E(0) #801738