What clothing items did Duane wear upon his return to class?

Duane's choice of clothing upon his return to class reflects a more formal or polished appearance, which is typically associated with a blazer, khaki pants, and necktie. This kind of outfit suggests that he is presenting himself in a serious or professional manner, possibly indicating an important event, a presentation, or an effort to create a positive impression on his classmates and teachers.

Choosing such attire may also signal an understanding of social norms regarding dressing for educational settings, where looking well-put-together can impact perceptions. In contrast, the other options suggest more casual or relaxed dressing styles that would not convey the same formality and intention behind Duane's selected outfit.