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".
Q: [header] How to use a propane torch [title] Choose the right propane torch for your needs. [step] Most propane torches consist of a small gas tank fitted with a regulator, with or without an electric igniter. If yours doesn't have an igniter, you'll need to use a striker to light the torch. <sep> (A) [substeps] In order to use a propane torch, you'll have to use either a regular propane igniter or a gallon-sized gas torch. Because of their small size, propane torches aren't combustible. (B) Electric ignalizers work by either heating up the propane until it melts and burns, then leaving the propane to warm up for longer. You also want to use striker filters to ensure that the torch is clean and free of obstructions. (C) [substeps] If you need low heat, opt for a propane torch with a flame-spreading tip, which will allow you to diffuse the flame to lower its heat. When using a high heat for repairing chain-link fences and the like, consider using an oxygen-fuel torch. (D) However, you cannot use one that is powered by conventional propane fuels. [substeps] There are several types of propane torches and will have their own unique labels to help differentiate yours from the others.
A:
C