Hi Jackson. I'm not so sure about grammar since i'm still a student, but in my opinion the sentence is wrong, it would be: " The answer wanting courtesy ". Because of the courtesy you are providing or offering is in the pursuit of an answer, that means that the verb is still in action, or in process.
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CalifJim`Your hair wants cutting,' said the Hatter. He had been looking at Alice for some time with great curiosity, and this was his first speech.`You should learn not to make personal remarks,' Alice said with some severity; `it's very rude.' Lewis Carroll, Alice's Adventures in Wonderland.CJThanks a lot, Jim.