Definition: 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: [header] How to replace leaf springs [title] Park the vehicle in a flat area. [step] For safety, move the vehicle to a solid surface, such as a concrete workshop or driveway. Choose a surface that is as even as possible. <sep> (A) If possible, switch off the spare tire. [title] Turn the gear stick, or key, down. (B) Many snails also prefer to park on lawns, because it gives them more room to move. [title] Try to pump the water pump slowly. (C) This is to give the vehicle stability and reduce the risk of an accident. [substeps] Make sure the vehicle is not leaning to the side. (D) [title] Loosen the nuts on the door of the vehicle. [step] Look in the glove compartment for the nuts.
Output:
C