The figure shows the order, but not precise values, of four points on the number line.

Which of the following represents the greatest value?


You can easily eliminate choice B, which provides the least value: a b < a (to the left of a on the number line). You can also eliminate choice D: b c < c (to the left of c on the number line). As for choice A, c – b > c (to the right of c on the number line). But is c – b > d – c, choice C? The answer depends on the specific values of the variables.

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