In this task, you are given a context and four options. Each option is a suggested ending for the context. You should read the context and pick the best ending for the context. Please answer with "A", "B", "C", and "D".
Q: [header] How to try on cosmetic testers in store [title] When choosing foundation, apply a small amount of the test on your hand, by the back of your thumb. [step] Hold up the foundation to your jawline. If it matches, then it's your colour! [title] Most cosmetics should be tested on the back of your hand. <sep> (A) [step] This is the only way to know, because most cosmetics bring out the illusion that nothing is wrong, unless it really is. [title] Get a few disposable eyebags. (B) [step] However, when choosing a lipstick, apply a small amount of tester to your finger. Do not wipe the tester onto your lips. (C) [step] So if you're a hairdresser, make sure you test the skin first. Your colour should definitely be tested there on a specialized basis. (D) [step] Then, go shopping! Do not purchase any product that is not " untested " for the colour of your skin. [title] Buy what you want and try it on.
A:
B