The last one (he was rude, shuffling to the front of the buffet line and elbowing customers out of his way)
Explanation:
I am not enitrely sure but I think it's the last one because the definition of a direct charactization is basically exactly what the words state. A direct characterization is when you talk about a character's PERSONALITY directly meaning it shouldn't be the first one because there is no personality directly stated and all though 2 and 3 mention some sort of personality, it is not direct. I think the most direct sentence of stating the man's personality is the last. let me know if this helps you :)
