Option 1 states that both Statement I and Statement II are individually true, and Statement II is the correct explanation of Statement I.

Statement I states that the Man Booker International Prize is now unlikely to be won by an English author, which means that it is not probable for an English author to win this prize.

Statement II explains that the Booker Prize Foundation announced that the Man Booker International Prize was to evolve from 2016 onwards into a prize for fiction in translation. This means that starting from 2016, the prize will be awarded to works of translated fiction and not to works originally written in English.

Option 1 suggests that Statement II explains why Statement I is true. Since the prize is now focused on translated fiction, it makes sense that an English author is unlikely to win it. Therefore, Option 1 is the correct answer.