og188求教!

piqiuwawa

that为什么不能指代many people,og188求教!
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
怎么看都觉得that指 many people是合理的呀,有人能帮我解释解释og的说法是什么意思吗,为什么用who就使主句和从句更一致呢??难道语法题中指人都不能用that吗?doubt中

piqiuwawa

thanks !!!!!!!