Which of the following is INCORRECT according to the passage？A．Voice communication becomes

Which of the following is INCORRECT according to the passage？

A．Voice communication becomes almost free eventually.

B．Your children can play interactive games in the car.

C．Spatial reuse of frequencies will be in trouble.

D．Lamppost could monitor pollution and air flow.

请帮忙给出正确答案和分析，谢谢！