The correct answer is D, "Some politicians are corrupt".
Step-by-step explanation: Stereotypes an exaggerated perception of characteristics that people think are true about everyone in a group just because a couple of them have them. These groups I refer are defined because of their race, sexual orientation, skin color, religion or nationality. In more simple words, it is a general idea, belief or image people have about a group of people.
In the options given in the questions, all are stereotypes except for the last one. The last one (Some politicians are corrupt) would be a stereotype only if it refers to all politicians, not some of them.