关于肺泡表面活性物质，下列说法正确的是（）

A.是由Ⅰ型肺泡细胞产生的

B.是由Ⅱ型肺泡细胞产生的

C.是呼吸道上皮细胞分泌产生的

D.是由呼吸道间质细胞产生的

E.以上说法均不正确

The 31–year–old New Yorker was injured      is known as a vaguila, in which hundreds of people chase five cows around the bull ring, pulling their ears and tail．

A．where it

B．in where

C．in which

D．in what