Injuries were relatively less in Los Angeles for the following reasons EXCEPT that______.A

Injuries were relatively less in Los Angeles for the following reasons EXCEPT that______.

A．the quake occurred at 4:31 a. m. on a holiday

B．the traffic was light on the city"s highway

C．changes in construction method made buildings more resistant to quakes

D．most people were in the open air

请帮忙给出正确答案和分析，谢谢！