有关急性脑血管病的病变部位，下列哪项是不正确的（）。

A.脑血栓形成最易发生在大脑中动脉

B.脑栓塞以大脑中动脉阻塞最常见

C.脑出血的血管最多在豆纹动脉

D.脑桥出血多由基底动脉的旁正中动脉破裂所致

E.蛛网膜下隙出血以大脑凸面畸形血管破裂最多见

He made another wonderful discovery, _______ of great importance to science.

A．which I think is

B．which I think it

C．which I think it is

D．I think which is