一道定语从句题（急!）
In our university there are several big parks _we students can go to enjoy the beautiful scenery． A．to which B．at which C．from which D．in which
我知道选A
我只是想问,为什么D不对?we students can go to enjoy the beautiful scenery为什么不能当做一个整体?非要拆开?有什么理由吗?