单选题
编号：2579152
1.WhatdidtestsinCambridgeandSingaporereveal?
- A.SignalGurucandetectthestatusoftrafficlightswithaccuracy.
- B.TrafficlightsinCambridgeworkbetterthanthoseinSingapore.
- C.DriversinSingaporefollowtrafficrulesbetterthanthoseinCambridge.
- D.TrafficlightsinCambridgearemoreadaptiveinoff-peakhour.