大全sec04-11

11.   Several studies have found that the coronary patients who exercise most actively have half or less than half the chance of dying of a heart attack as those who are sedentary.

(A) have half or less than half the chance of dying of a heart attack as those who are sedentary

(B) have half the chance, or less, of dying of a heart attack than those who are sedentary do

(C) have half the chance that they will die of a heart attack, or less, than those who are sedentary do

(D) are at least fifty percent less likely to die of a heart attack as those who are sedentary

(E) are at least fifty percent less likely than those who are sedentary to die of a heart attack

我觉得这个题的b没有什么问题，为什么选e，我也找不出e的问题。

请指教。。。。

by the way, b is wrong b/c the structure  "have half a chance than..." is wrong.

to make it correct:

either "half a chance as..."

or "more (less) than..."

非常感谢，