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

通过了 31 号法案，扩大了城市中需要防火的区域。

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?

以下哪一项是家庭加固防野火的例子… … A、防火屋顶； B、在通风口处加网； C、清除房屋五英尺范围内的植物和覆盖物；或 D，以上全部？