根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。
There are all sorts of good sensible reasons to avoid getting angry. Not only does it make us feel bad, it also makes us do stupid things without noticing the risks and it can be self-destructive ( 毁坏性的). ___ 16____ But like all emotions, anger has its purposes, which can be used for good effects.
Anger is a motivating force.
In fact anger itself is a kind of positive energy and a powerful motivating force. ___17 When we see something as beneficial, we want it more when we are angry. So, when used right, constructive anger can make us feel strong and powerful and help push us on to get what we want.
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It may sound like a strange thing to say, but angry people have something in common with happy people. That's because both tend to expect favorable results. By comparison those experiencing more fear are more pessimistic (悲观的) about the future and expect further terrors.
Anger can benefit relationships.
