Answer:Tina is an exception to his stereotype about southerners.
Step-by-step explanation:
Stereotypes is a belief we have about a certain group of people which is usually not grounded on reasonable or logical facts but we still believe those stereotype are true.
Alan is not likely to just dismiss his stereotype because people hold on strongly to their stereotypes and it not easy to just stop believing they are true so it easy for Alan to just think that Tina is just an exception but the stereotype is still true