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Your frustration is valid considering that you would not have studied this topic earlier in your study unlike the other topics you are currently comfortable with. But, the truth is, Ethics can be quite a relief if you SIMPLY UNDERSTAND the concepts. When would a behavior be a violation type of questions can be easily answered if you understand the core of Ethics. Additionally, answering end of chapter questions and doing many practise tests would be useful in reinstating the concepts. My two cents.