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. | 
