Be patient. It will take us a while to work( ) the meaning of

Be patient. It will take us a while to work( ) the meaning of this poem.
A、for
B、out
C、up
D、off
【正确答案】：B
【题目解析】：work out 想出，计算出，得出；work for 为...而工作，句子含义为我们需要点时间想出这首诗歌的含义。