Teacher: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".
Teacher: Now, understand the problem? Solve this instance: A knife is put into a sharpener and moved back and forth and used on a circular sharpener. a pair of scissors <sep> (A) is sharpened on the sharpener. (B) is scraped away and then covered with a paper. (C) is used and used on trimming a cheek. (D) are placed into a glass of liquid and cut along skin.
Student:
A