问一道gmat 语法题目~

问一道gmat 语法题目~
prep08版
191.For the last five years the Dutch economy has
grown faster than Britain, France, or Germany, with the unemployment rate having
remained well below that of the other three countries.
A. Britain, France, or Germany, with the unemployment rate
having remained
B. have those of Britain, France, or Germany, and the
unemployment rate remaining
C. have Britain, France, and Germany, and the unemployment rate
has remained
D. the economy of Britain, France, and Germany, with the
unemployment rate that has remained
E. the economies of Britain, France, and Germany, and the
unemployment rate has remained
答案是E我知道,但是我想问的是B、C两个选项为什么会有have出现在Britain,France之前~这是什么语法现象?如果说是比较结构补出助动词,可是助动词的补出不是应该在Britain之后吗?为什么在之前就补出了?求问~