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 make curls with a flat iron [title] Select a skinny flat iron. [step] You need one no wider than one or two inches. A paddle iron will be too wide. <sep> (A) [title] Lay your hands flat on the flat, elastic side of the iron. [step] Make sure that both sides are touching. (B) A regular flat iron will be flat, and you cannot use a length of iron tube for curls. For most flat irons, a paddle iron is best. (C) Plus you want to work out the material in the iron in one area. [title] Pull one of the curls to the left. (D) [title] Prepare your hair for exposure to heat. [step] Lightly spray your hair from about 6 inches (150 mm) away with a heat protectant.
Output:
D