The boy's grandfather died _ a flood and his grandmother died __old ageA of,from.B from,at.C from,of D of,in选什么.为什么
问题描述：
The boy's grandfather died _ a flood and his grandmother died __old age
A of,from.B from,at.C from,of D of,in
选什么.为什么
答
C
答
C
die from 死于外因
die of 死于内因