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 convert bitcoins to dollars [title] Compare the rates offered by different conversion services and choose the best one. [step] Even when the average bitcoin conversion rate improves, different conversion services offer different conversion rates. For instance, suppose one service offers to convert your bitcoins at a rate of 1 to $5 , 000 and another offers to turn 1 bitcoin into $5 , 200. <sep> (A) Just because a service offers to convert bitcoins, it doesn't mean it will convert them. See how to convert bitcoins into dollars for more information. (B) You cannot purchase replacement bitcoins for your gains. [substeps] If you buy replacement bitcoins for your gains, you must pay a fee to have your subsequent bitcoins made available to your customers. (C) All other things being equal, you should go with the second service to get the most out of your bitcoins. [title] Convert your bitcoin using a service with low fees. (D) You might compare the rates offered as well as their differences before making a decision, for instance. [substeps] Pay attention to the difference between each service so you don't end up with two that have identical rates.
Output:
C