The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence.

Naturalization in the UK requires five years’ residence or three years if the applicant’s spouse is a Briton. Other conditions include good behavior and sound mind. Those who are not married to a Briton are also required to have a sufficient knowledge of English. They must also intend to have their main home in Britain.
（）for acquiring British citizenship.