Final answer:
Tante Lou is upset with Grant leaving for town because he was disobeying her request to visit Jefferson.
Step-by-step explanation:
Tante Lou is upset with Grant leaving for town because he was disobeying her request. In the book, 'A Lesson Before Dying', Tante Lou asks Grant to stay in the town to visit Jefferson, who is a young man on death row. However, Grant chooses to leave town, which upsets Tante Lou because she believes that Grant should be there to support Jefferson during this difficult time.