【单选题】
A <{p data-we-empty-p="" _msthash="20518" _msttexthash="5096"}>8<{/p}>
B <{p data-we-empty-p="" _msthash="20519" _msttexthash="9659"}>12<{/p}>
C <{p data-we-empty-p="" _msthash="20520" _msttexthash="4732"}>4<{/p}>
D <{p data-we-empty-p="" _msthash="20521" _msttexthash="10075"}>16<{/p}>
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