How did he feel about her behavior?

The selection of "He was disgusted" indicates a strong negative reaction to her behavior. This choice suggests that her actions were not just disappointing or bothersome but elicited a visceral feeling of revulsion or distaste in him. Such a feeling could stem from witnessing behavior that he found morally objectionable or socially unacceptable, highlighting a significant emotional response.

In contrast, the other options reflect more neutral or positive feelings. "He was impressed" would indicate admiration or a positive acknowledgment of her actions, which contradicts the notion of being disgusted. "He was indifferent" implies a lack of interest or concern, suggesting her behavior did not affect him deeply, which conflicts with the strong feeling suggested by disgust. Lastly, "He was amused" points to a lightweight, humorous reaction, suggesting that he found her behavior entertaining rather than repulsive. Each of these alternatives provides a different emotional lens that does not align with the intensity of feeling associated with disgust.