一道SAT的IS题,关于代词
Finding a wide variety of financial services in a small city is usually not as easy as it is in metropolitan areas.
划线部分：it is
A.it is
B.is that
C.for those
D.for that
E.are those
我当时想的是,it算不算指代不清,因为前面的句子有动名词finding,也有名词 small city