问题详情

By describing a typical situation of a lost driver on the road, the author intends to
A．make us believe how complex the highway computer network is.
B．let us know how in-car computers are linked to road signs.
C．show us how helpful a navigation computer can be.
D．tell us that NAVSTAR has come into use.请帮忙给出正确答案和分析，谢谢！