Answer:
Stereotype
Step-by-step explanation:
First let's look at the definition of the answers
Generalization: a general statement or concept obtained by inference from specific cases
Discrimination: the unjust or prejudicial treatment of different categories of people or things, especially on the grounds of race, age, or sex
Stereotype: a widely held but fixed and oversimplified image or idea of a particular type of person or thing
It's not discrimination because there is no unjust treatment. Generalizations and stereotypes are similar (and, in fact, a cultural generalization can become a stereotype if it is definitively applied to individual members of the group), but this would be a stereotype because we assuming the actions of a specific person, not a group.
If I said 'Most people attend community college because it's cheaper,' that would be a generalization.
If I said, 'Suzy is attending community college because it's cheaper,' without any context or factual evidence, that would be a stereotype.