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 clean up gasoline [title] Stop the spill at the source. [step] First thing's first-before you get too worried about how to clean a gasoline spill, you'll want keep it from getting any worse. If you've accidentally knocked over a fuel tank or container, return it to an upright position immediately and secure the lid or cap over the opening. <sep> (A) If the spill originated from a pump, make sure that it's shut off and that the nozzle has been replaced. [substeps] Even a small gasoline spill can quickly become dangerous. (B) [substeps] Do not spray or pour fuel directly into the container. Only pour enough to fill the container without splashing the gasoline all over the place. (C) [substeps] There are two types of fuel containers: polystyrene and solid. Both types of containers have opening mechanisms that allow you to open and close them. (D) [title] Have the container drained and put on ice. [step] You can really hurry the process along by shoveling a fully drained gasoline container into the sink, which will reduce the amount of gasoline that escapes.
Output:
A