A Two-Factor Research Study Is Used to Evaluate the Effectiveness

A two-factor research study is used to evaluate the effectiveness of a new blood-pressure medication.In this two-factor study, Factor A is medication versus no medication and factor B is male versus female.The medicine is expected to reduce blood pressure for both males and females, but it is expected to have a much greater effect for males.What pattern of results should be obtained if the medication works as predicted?

A) a significant main effect for factor A (medication) .
B) a significant interaction.
C) a significant main effect for factor A and a significant interaction.
D) none of the above.