What is ironic about billy saying "excuse me" and "i beg your pardon" while bumping into others?

a. billy saying "excuse me" is ironic because he is an impolite, rude person.

b. billy saying "excuse me" is ironic because he is asking for forgiveness, but he’s not sorry.

c. billy saying "excuse me" is ironic because he is behaving politely in the middle of war.

d. billy saying "excuse me" is ironic because he is intentionally trying to hurt ronald weary