A. is looking to use its waterfront as a way for it to improve the quality of urban life and attract
B. is looking at using its waterfront to improve the quality of urban life and attract
C. are looking to use their waterfronts to improve the quality of urban life and attract
D. are looking to use its waterfront as a way of improving the quality of urban life and attracting
E. are looking at using their waterfronts as a way of improving the quality of urban life and attract
Ans:C
我以為主詞是one of a large number of communities, 那既然是"one" 應該是單數吧, 為什麼要選are呢??

請各位大大明示
