问题详情

When the narrator says "It was a hard struggle for so small a child" (Line 4, Para. 5), she means that

A．saving her sick sister was too big a task for her as a child.

B．a child could sometimes do things beyond her imagination.

C．a child could not distinguish the reality and her fantasy.

D．her little sister"s condition had become too bad to do anything about.

请帮忙给出正确答案和分析，谢谢！