GWD 1-16，我错在哪儿啊？

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Soaring television costs accounted for more than half the spending in the presidential campaign of 1992, a greater proportion than it was in any previous election.

个人认为C的时态错了，假设用完成时态的话后面不应该用any而是应该用any other将自己排除。这里用了any，就是不包括自己，也就是说是跟1992之前的在比。