同意。。并补充:
After the removing---the proposal---everyone will use private phone to make an alarm. So the statement= Alarm via private phone won't hamper people's ability to report a fire compared to alarm boxes. 所以选项一定是围绕 private phone报警的好处考虑的!!!如果能trace的话,就能达到alarm box的好处--知道火警地点;又能避免 alarm box 的坏处---恶作剧报警。