Legislative Elections Were Held in Sweden on September 17, 2006

Legislative elections were held in Sweden on September 17, 2006, and seven parties won seats. Although the left-wing Social Democratic Party won more seats than any other party, the leader of the largest right-wing party was appointed to be the first formateur. Which of the following statements might best explain this choice?

A) The choice of formateur is random. As a result, the leader of the largest right-wing party had the same chance of being chosen as did each of the other party leaders.
B) In this particular election, four right-wing parties ran as a preelectoral coalition and together won a majority of the seats. Because they had pledged to govern together if successful, it made sense to give the leader of the largest coalition party the position of formateur.
C) The position of formateur is always offered first to a party on the right; if the first attempt to form a government fails, the second formateur will be chosen from a left-wing party, and so on.