Which only lists multiples of 18?

Multiples of 18 are found by multiplying 18 by whole numbers: 18 × 1 = 18, 18 × 2 = 36, 18 × 3 = 54, and 18 × 4 = 72. Choice D lists exactly these multiples. The numbers in choice A include 27 and 45, which are not multiples of 18.

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