宽容并不意味着是非不分，爱憎不明；也不是曲直不辨，麻木不仁。请用简洁的语言概括其中蕴涵的道理。

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—How are things going, Jenny?

—They have set out to deal with the present situation ______ they think deserves their immediately attention.

A．what

B．where

C．when

D．which