题目

As machines go, the car is not terribly noisy, nor terribly polluting, nor terribly dangerous; and on all those dimensions it has become better as the century has grown older. The main Problem is its prevalence, and the social costs that ensue from the use by everyone of something That would be fairly harmless if, say only the rich were to use it. It is a price we pay for equality. Before becoming too gloomy, it is worth recalling why the car has been arguably the most successful and popular product of the whole of the past 1oo years---and remains so. The story begins with the environme家猫与老鼠之间的关系是（ ）A．竞争关系B．寄生关系C．捕食关系D．合作关系