A.There is no need to use a gun in killing a person
B.Criminals can kill whoever they want by a computer
C.The computer can replace any weapons
D.The function of a computer is just like a gun

A.the difiiculty to increasing government income by other means
B.the importance of commerce in feudal Japan
C.the search of Japan's Tokugawa shoguns for solvency
D.the unfairness of the tax structure in eighteenth-century Japan