Yesterday was no exception . When I arrived inside the airport in front of the United ticket counter area , the first thing I noticed was that the Premier Executive line was closed off . Normally there are United employees out front directing passengers . This time there were none .
According to the above context, choose the best option to answer the following question.
Question: Why was the premier executive line closed off ?
Options:
A. United employee service has risen .
B. United employee service has not skipped a beat . .
C. None of the above choices .
D. There may be a strike taking place .


D