47. What can we infer from this article?
(A) Most people in the world have done BASE jumping.
(B) With safer equipment, BASE jumping is not fun anymore.
(C) In many nations, people are not allowed to do BASE jumping.
(D) The writer sometimes thinks about trying this extreme sport himself.

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統計： A(109), B(84), C(620), D(47), E(0) #666162