(31 〜33)    Are you tried of the puzzles you usually do? Sudoku is a new choice. Sudoku consists of the Japanese characters Su(meaning “number”）and Doku (meaning ‘‘single’，)，but it was not invented in Japan. It was created by Howard Games in 1979. The puzzle was first introduced into Japan by Nikoli Puzlle Company in 1984. In 1986，Kaji Maki, the president of Nikoli made the rules strict and clear. Soon in the same year Sudoku became popular in Japan. In November 2004, The Times, a British newspaper, first printed it in the newspaper. It became an international hit in 2005. Now Sudoku becomes very popular all over the world. The rules of the puzzle is to fill in the grids so that every row, every line and every 3x3 box has the numbers 1to 9. Here is a Sudoku. Please relax and enjoy. It’s fun. ★grid格子★ consists of包含；組成★ strict嚴謹的
31.( ) Who created Sudoku?
(A) Howard Games.
(B) Sudoku.
(C)Kaji Maki.
(D) Nikoli.