Questions 26 to 28 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions. Now listen to the news. What happened before the strike broke out

A．British Airways dismissed many workers.
B．Thousands of passengers left stranded at Heathrow Airport.
C．British Airways cancelled 80% of its flights.
D．British Airways cut down the wages of the workers.