Answer:
The school of thought that best fits Greg's experience is labeling theory.
Step-by-step explanation:
Labeling theory is a sociological theory that explains how people's behavior and experiences are influenced by the labels that are applied to them. According to this theory, people who are labeled as "deviant" or "problematic" by others are more likely to engage in deviant behavior, as they internalize the negative labels that are applied to them and come to see themselves as "deviant" or "problematic."
In Greg's case, he was unfairly labeled as a "problem" child by his first grade teacher, partly because of his older brothers' behavioral problems. This negative label then followed him throughout grade school, and he internalized it, thinking of himself as a "problem" child. As a result, he eventually dropped out of school, thinking he was "born to fail" anyway.
Therefore, Greg's experience is best explained by labeling theory, which suggests that the negative labels applied to him by his teacher and others influenced his behavior and experiences throughout his school years.