Which option completes the paragraph below correctly? After a particularly long ...

Questão de Inglês da banca Marinha aplicada no concurso ESCOLA NAVAL (2019). Confira a resolução completa abaixo:

Which option completes the paragraph below correctly?
After a particularly long week in Shanghai and Beijing, several of u s ________ on a United flight direct to Chicago on a late Friday afternoon. We ________ at the airport only to find out the company________ the flight right before takeoff.
(Adapted from https://www.linkedin.com/pulse)