资料题：Which of the following expresses the main idea of this passage（　）。

The space race is not simply the objective search for knowledge it is often made out to be.it is just an extension of the race for power on earth.Only the wealthiest nations can compete and they do so in the name of pure scientific research.But in reality, all they are interested in is power and prestige.They want to impress us, their spectators, with a magnificent show of strength.Man has played the power game ever since he appeared on earth.Now he is playing it as it has never been played before.The space mace is just another aspect of the age-old argument that"might is right" .We are often told that technological know .how, acquired in attempting to get us into orbit, will be utilized to make life better on earth.But what has the space race done to relieve the suffering of the earth's starving millions? In what way has it raised the standard of living of any one of us?Poverty, huger, disease and war are man's greatest enemies and the world would be an infinitely better place if the powerful nations devoted half as much money and effort to these problems as they do to the space mace.For the first time in his history, man has the overwhelming technological resources to combat human suffering, yet he wastes them on meaningless pursuits.if a man deprived himself and his family of food in order to buy and run a car, we would consider him mad.Individuals with limited budgets usually get their priorities right: they provide themselves with necessities before tying to obtain luxuries.Why can't great nations act in the same sensible way? Let us put our house in order first and let space look after itself.