I believe your answer should be A.
Answer:
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A code of ethics and professional conduct outlines the ethical principles that govern decisions and behavior at a company or organization. They give general outlines of how employees should behave, as well as specific guidance for handling issues like harassment, safety, and conflicts of interest.
It's GigaBytes actually. And is it RAM or storage capabilities?
And also those are brands. Not models. For example, Samsung has different phones. Not just one.