CD22 7 里找不到题号，答案是什么啊 谢谢

GWD-9-Q2:

In an attempt to produce premium oysters, a firm in Scotland has developed a prototype of a submersible oyster farm, sitting below the surface of the ocean, and it provides ideal conditions for the mollusks’ growth.

A.      farm, sitting below the surface of the ocean, and it provides

B.       farm, sitting below the surface of the ocean for providing

C.       farm that sits below the surface of the ocean and providing

D.      farm that sits below the surface of the ocean and provides

E.       farm that is sitting below the surface of the ocean and it provides

D.

farm that sits... and provides...