31 was passed that expanded  the zones in the city that required fireproofing.

通过了 31 号法案，扩大了城市中需要域。

Which of these is an example of home hardening against wildfires... ... A, fireproofing roofs; B, adding mesh to air vents; C, getting rid of plants and mulch within five feet of a house; or D, all the above?

以下哪一项家庭加固野例子… … A、顶； B、在通风口处加网； C、清除房五英尺范围内植物和覆盖物；或 D，以上全部？