A. Immanuel handed the gate attendant his tickets and passport, which she set off to the side as if they were unimportant. (paragraph 1)
Explanation:
A situational irony is a form or type of irony where the reader's expectation of what might happen is contrary to what actually happens. It is when an expected outcome is contrary to what actually happened.
In the given options, situational irony is when the gate attendant to the passport and ticket from Immanuel but then puts them to the side. Given that the tickets and passports were given by Immanuel to ensure his passage into the aircraft, and that it was expected of the attendant to check them, the act of setting the tickets aside is quite contrary to what one would expect.
Thus, option A is an example of situational irony.