我选A.what he is
问人职业时可以用 what is he?或者what does he do?或者What is his job
但是这句里Could you tell me what he does 语法上没错,但产生了歧义.通常人就理解为“你能告诉我他（平时）都干些什么吗”
回答就应该是“he travels and draws”等等