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: [header] How to snake a toilet [title] Place the end of the snake into the toilet. [step] Unfurl the snake and lower the bulbous metal end into the toilet bowl. Begin the feeding the snake into the mouth of the drain. <sep> (A) At the end of the snake is a curved hook, which will help break up and grab debris that has accumulated in the pipes. [substeps] Make sure the plastic coating on the end of the snake is intact so it doesn't scratch the porcelain. (B) [substeps] Place one hand over the mouth of the toilet bowl and the other over the toilet. Place one hand on the long segment of the snake, and lean the toilet over it to slide the snake loose. (C) Loosen as much air as possible into the toilet bowl by pushing down hard on the plastic plunger button. [title] Position the shank of the snake tightly into the receptacle. (D) [title] Put the base of the snake in line with the top of the bowl. [step] During the feeding process, you will need to position the part of the snake that feeds upward in the toilet bowl.
Student:
A