It's a second round of strike for cabin crew of British Airways. This one starts on Saturday morning and goes for four days. British airways news says it has put its contingency plans into effect and that will allow it to continue with most of its flights. The good news for travelers is that British Airways flights out of London's Gatwick and City airports will not be affected. They will continue as scheduled. Here however at Heath row about 50% of British Airway’s flights will be affected but British Airways says that some cabin crew have been coming to work despite the strike and that together with leasing 11 airplanes on an emergency basis means that they’ve been able to go ahead with some of the scheduled flights here. British Airways estimates about 50% of short-haul flights will continue as normal and 70% of the long-haul flights here at Heathrow will also go ahead. Nonetheless, it is getting expensive for the company. It’s estimated to cost about 10 million dollars a day for British Airways. Choose from the following choices those that can help summarize the paragraph.(   )