GWD1-Q30:

The ancient Anasazi harvested such native desert vegetation as the purple-flowered bee plant, what they now commonly call wild spinach in northern Arizona and other parts of the southwestern United States.

A.      what they now commonly call

B.       a plant that they now commonly call

C.      now commonly called

D.      and is mow commonly called

E.       which it is now commonly called

 答案是c，但感觉c有点ambiguous. 不知是指the ancient Anasazi还是the purple-flowered bee plant.

A：成分缺少

B：不是Plant 被call

D ;and多余。

E ,whih it is..it错误，which指代错误