A Professor Knows That If It Is Raining Outside, the Window

Multiple Choice

A professor knows that if it is raining outside, the window of her office will be wet. She looks at her window and notices that it is wet. She, therefore, concludes that it must be raining outside. Which kind of reasoning is she using?

A) Affirming the consequent
B) Affirming the antecedent
C) Denying the consequent
D) Denying the antecedent