It is not who you are

题目

It is not who you are
but what you can do for these orphans now ____ is of greatest importance.
A.what B.which C.that D.this
为什么,请分析一下句子结构,

答案

it is not (who you are but what you can do for these orphans now) that is of greatest importance.
同学,强调句型啊
it is 加 被强调部分 加 其他
因为有人又有物,所以只能用that
告诉你诀窍,一般强调句型让你选连接词,有that的话,必选
加分啊