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 protect a convertible [title] Wash your convertible regularly. [step] It is recommended that you clean your convertible top at least once every 4 weeks to keep dirt from sinking into the fabric or vinyl. [title] Wet the top of the convertible with a hose. <sep> (A) [step] Use a gentle car shampoo or one made specifically for convertible tops, which can be found in any automotive or home improvement store. Apply the cleaner with a sponge as you would to the rest of your vehicle. (B) [step] You should only wash the top so that it is lightly damp to get rid of any unwanted grime or dirt. [substeps] If you are dealing with a large number of cars, it is best to only clean the top of the convertible top once or twice a week. (C) [step] Use between two and three gallons of water. After some time, check the label on the water bottle to see how often your convertible top should be wet. (D) [step] You can prevent deodor (cavanic disease) from developing by wetting the top of the convertible top without water. This will remove dirt and then all of the dust.
Output:
A