188. As a result of medical advances, many people that might at one time have died as children of such infections as diphtheria, pneumonia, or rheumatic fever now live well into old age.
(A) that might at one time have died as children
(B) who might once have died in childhood
(C) that as children might once have died
(D) who in childhood might have at one time died
(E) who, when they were children, might at one time have died
把B带入原句觉得读不通～～
As a result of medical advances, many people who might once have died in childhood such infections as ……
我觉得死于什么应该是die from 或die of吧？？die such as….没看见过，而且中间还被时间状语in childhood隔开. | 
