中国問題ちょっと疑問＃2

Local residents claim that San Antonio, Texas, has more good Mexican American restaurants than <any city does> in the United States.

a) any city does
b) does any other city
c) other cities do
d) any city
e) other cities

b)が正解ですが、e)の駄目は理由をどなたか教えていただけますか。

http://tools.geocities.co.jp/CollegeLife-Cafe/6302/@geoboard/