People often give into negative peer perspire bc they want to be accepted. Often they will have the Fear of being ridiculed. They don't want to offend their friends so they do things they might not normally do. They may not know who to say "no". Hope that helps :D
The correct answer is C.
An author's credentials can determine a health source's credibility. None of the other options would apply to credibility. When it comes to health, if you want to make sure that what you are researching or reading is authentic and reliable you need to find out whether the author is a professional health expert or not. You can do this by finding out their credentials.
I believe it would be the distortion or variation of serving sizes