The following pictures show a part of the chessboard. Which one can correctly show the way in which Sissa had the grains of wheat put on it（）

A．with the help of a Chevrolet owner
B．with the help of computers
C．by a witness
D．in a car

A．Crime--A Grave Problem in the West
B．Chevrolet--A Make of an Old Car
C．Computer--A Powerful Aid in Fighting Against Crime
D．Police--A Useful Force in the Fight Against Crime