请教英语定语从句选择题

问题描述:

请教英语定语从句选择题
That is the robber_____arrest a reward was offered.
A:for whomB: for whose C:about whom D:about whose
请问这道题应选什么答案,请解释详细点,谢谢~~~

B: for whose
whose=of the robber
分开两句你就清楚了
That is the robber.
a reward was offered for the arrest ofthe robber