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: (CNN) Boris Johnson is a Conservative British politician famous for some decidedly undiplomatic utterances. But on Wednesday he became the UK's new foreign secretary, a role in which he oversees the country's diplomats and discusses sensitive matters with his global counterparts. The New York-born Brit is known for his colorful rhetoric over the years and distaste for political correctness. While the former London mayor has expressed considerable admiration for the U.S. over the years, he has also lit into American political leaders President Barack Obama and presumptive GOP presidential nominee Donald Trump. The State Department, however, is welcoming his appointment. U.S. Secretary of State John Kerry congratulated Johnson Thursday, and the two pledged to work closely together as NATO allies, according to the State Department. Kerry also stressed U.S. support for a "sensible and measured approach" to the Brexit process" of the the UK's departure from the EU.The new British foreign secretary compared Clinton to 'a sadistic nurse in a mental hospital'He said of Trump: 'I am genuinely worried that he could become president' 
 Question:Part of _'s reasoning was to avoid paying U.S. taxes.

Boris Johnson