Finally , I called the United reservations number and reported the Dulles domestic check - in problem . The representative placed me on hold and checked with IAD operations . She came back on line and told me that there was a shortage of employees that day . I was very satisfied with that answer , though this did n't excuse United management 's responsibility to at least direct passengers , employees , and contractors to keep the lines moving .

Question: Why would I be satisfied with the reason for my trouble with United ?
Answer: None of the above choices .I am glad because I was able to speak with an old friend at customer service .I will understand the reasoning for the problem I had with United .I am glad because they gave me a full refund .