You will be given a definition of a task first, then some input of the task.
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".

[header] How to choose a good used wood stove [title] Assess the age of the wood stove. [step] Wood stove designs have been drastically improved in recent years. New stoves heat more efficiently, producing less smoke and ash and consuming wood more slowly. <sep> (A) There are several reasons why you should chiefly consider wood stoves that are less than about 15 years old. [substeps] Stoves more than a few decades old will likely not be ul-listed or certified by an environmental regulator, such as the environmental protection agency (epa) in the united states. (B) Look for a stove with a roughly 24 hour temperature in order to ensure that they aren't too hot to be used. Consider always checking the age of the wood stove, looking at a clock in a gallery or picture of how it cycles between 14. (C) An older stove may also produce fewer smoke bubbles, which is important when choosing a used stove. [title] Decide which model you'd like. (D) [substeps] Longer stoves will require fewer steps to light, whereas shorter stoves will reach warmer temperatures as well. Are you buying a used stove that is weathered and has fair reviews? Read up on the history of the stove and ask yourself why the outage has changed dramatically in recent years.
Output:
A