编制城市规划应当在（）阶段运用城市设计的手法。

A．编制控制性详细规划

B．编制修建性详细规划

C．编制城市规划各个阶段

D．编制分区规划阶段

I think you've got to the point ______ a change is needed, otherwise you'll fail.

A. when
B. that

C. where

D. which