Nicole,
This is really a difficult question to answer, because unlike in the Scope or Time Management Knowledge Area, many questions about ethics are "flexible" and often not so clear cut. So trust me when I say... you are not the only one.
The best advice that I have for you is to simply continue to answer as many ethics questions as you can. Every time you answer a question correctly (or incorrectly) open up the code of ethics again and review the section to which it pertains. This is the best and fastest way to learn and translate the code: by applying it to actual sample questions and learning from your correct / incorrect answers.