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The question stem is simply asking if the operation is multiplication, because that's the only one of the three operations where the question stem holds true.

Statement 2 says it's subtraction. Ergo, not multiplication. Ergo, sufficient.

Statement 1 implies that it's not multiplication or addition. Ergo, subtraction. Ergo, not multiplication. Ergo, sufficient.

The question stem is simply asking if the operation is multiplication, because that's the only one of the three operations where the question stem holds true.

Statement 2 says it's subtraction. Ergo, not multiplication. Ergo, sufficient.

Statement 1 implies that it's not multiplication or addition. Ergo, subtraction. Ergo, not multiplication. Ergo, sufficient.