请看为什么正确选择只能是 A :
派谁去那里工作?Who is sent to work there ? (正确)
你建议派谁去那里工作? Do you sussest who is sent to work there ? (错误,因为特殊疑问句作宾语从句时,必须把疑问词放在主句开头)
Who do you sussest is sent to work there ? (错误,因为 sussest 表示“建议”的意思时,宾语从句的谓语动词必须用"should + 动词原形"或者“动词原形”)
Who do you sussest (should) be sent to work there ? (正确)