Injuries and deaths were relatively less in Los Angeles because the quake occurred at 4:31 a.m. on a holiday, when traffic was light on the city’s highways. In addition, changes made to the constructions codes in Los Angeles during the last 20 years have strengthened the city’s buildings and highways, making them more resistant to quakes. Q: One reason why the loss of lives in the Los Angeles earthquake was comparatively low is that ______.
A.
new computers had been installed in the buildings
B.
it occurred in the residential areas rather than on the highways
C.
large numbers of Los Angeles residents had gone for a holiday
D.
improvements had been made in the construction of buildings and highways