885-1-16请指教！

excellent

Los Angeles has a higher number of family dwellings per capita than any large city.
(A) a higher number of family dwellings per capita than any large city
(B) higher numbers of family dwellings per capita than any other large city
(C) a higher number of family dwellings per capita than does any other large city
(D) higher numbers of family dwellings per capita than do other large cities
(E) a high per capita number of family dwellings, more than does any other large city

问题是：numbers of 和 a number of 一样吗？也就是说如果B中than后加上do，是否也对？

sbbi

这里不一样,这里NUMBER指数字,根据句意应用单数

excellent

谢谢sbbi老师的指点！