Instructions: 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".
Input: A man named russ is standing in a shop called out-n-back bicycle specialist and is holding a tire as he talks. A few colorful screens display with words on them. the man <sep> (A) is once again shown with the tire and he begins to show how he removes the rubber from the rim using a blue object. (B) points the left tire and simulates exercising using his hand to drill holes while also demonstrating how to tighten the jack. (C) is describing the mechanics of fit tire and what it should look like after being molded. (D) talks about the gadget as he shows the components.
Output:
A