I'll give you a question, please answer with step-by-step reasoning process. Why is grooming often recommended to greasy teens?\nOptions:\n- neatness\n- selfishness\n- mistakes\n- cleanliness\n- satisfaction

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Teens is referred to people in their teenage. Greasy means oils and sticky. Greasy teens means teens with oils and sticky faces. Oily and sticky means not clean. Grooming themselves makes one clean. cleanliness means the quality of being clean.
The answer: cleanliness.
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