Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: A low-cost airline from the land of the Vikings has launched a dramatic new transatlantic price-war against British Airways and Sir Richard Branson's Virgin with the 'cheapest' one-way UK tickets to Boston from as low as £179 . The daring raid by Scandinavian budget airline Norwegian is likely to spark retaliatory headline-grabbing price cuts by its rivals when the new service begins next spring with flights between London's Gatwick and Boston's Logan airports. The new Norwegian flights from Gatwick airport are directly targeting major airlines on the route including British Airways, Virgin Atlantic, Delta, American Airlines and KLM, which fly to Boston directly or via other hubs.Norwegian offering 'cheapest' one-way UK to USA ticket among carriersThe route will launch next spring, from London Gatwick to Boston LoganBritish Airways and Virgin have also announced lower long-haul fares 
 Question:_ insists the £179 base price is not just a 'one-off' launch offer.

Norwegian