Instructions: 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 handrails [title] Make a cleaning solution with baking soda and oil. [step] Combine an equal amount of mineral or coconut oil with baking soda. Mix thoroughly with a spoon. <sep> (A) [title] Sweep or vacuum the wood to remove excess moisture. [title] Remove soap residue with a soft cloth. (B) This will help to loosen stuck-on dirt. [substeps] You can use bottled lemon juice as a cleaner. (C) The mixture should have the consistency of a paste when you are done. [title] Apply the solution to a microfiber cloth. (D) Let the solution sit in the cracks on the sides of the railings and balconies, making sure not to touch them. [title] Vacuum the surfaces of the railings.
Output:
C