Choice C may be faulted for distortion of meaning and diminished clarity because it suggests that the point of Wootton's example was the elephant's very existence; comparative earnings are presented (after and) as incidental detail.
比较双方不对等
C is passive and separates the two clauses by an "and" when we are actually trying to draw a connection there. Eliminate.
C is passive and separates the two clauses by an "and" when we are actually trying to draw a connection there. Eliminate.
that解释的应该是income的例子,而本句的重点在于elephant的存在,earings成为附带提及的东西
不如 a 简洁
and it earned与主语并列了
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