必须做到“三知”，即：知道本岗位的（）、知道业户的一般情况、知道小区内的各项服务物业业务部门和设施设备。

Why does the speaker ask the addressee to write in English a. Because the speaker cannot read Chinese. b. Because English is the working language. c. Because Chinese cannot be displayed properly in the speaker’s computer. d. Because English is the language in which the speaker’s computer is designed.