According to the answer, the number for Quantity A is five (7, 1+6, 1+2+4, 2+5, 3+4). But since we can only sum “positive integers,” shouldn’t we exclude 7 since it is the sum of 7 and 0 (not a positive integer)?

In that case, you would also be eliminating the 7 from contention in Quantity B as well, so I believe the answer would still be C.

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