[单项选择]

We have escaped the battle field and now can, with modem guidance system on missies, touch virtually every square yard of the earth’ s surface. It no longer involves only the military profession, but engulfs also entire civilian populations. Nuclear weapons have made major war un thinkable. We are forced, however, to think about the unthinkable because a thermonuclear war could come by accident or miscalculation. We must accept the paradox of maintaining a capacity to fight such a war so that we will never have to do so.
War has also lost most of its utility in achieving the traditional goals of conflict. Control of territory carries with it the obligation to provide subject people certain administrative, health, education, and other social services; such obligations far outweigh the benefits of control. If the ruled population is ethically or racially different from the rulers, tensions and chronic unrest often exist which further reduce the benefits and increase t
A. possibility of material gain
B. promoting deserving young men to higher positions
C. potential for increasing the security of the nation
D. desire to capture productive farming lands