Detailed 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".
Q: [header] How to flush power steering fluid [title] Check your owner's manual for the recommended power steering flush schedule. [step] Your power steering system is actually remarkable at staying clean. That said, over time natural wear and tear will cause bits of rubber, plastic, and dirt to enter the fluid, and this can cause problems to the entire system if the fluid is not flushed. <sep> (A) Each car has it's own suggested interval after which you should change the fluid, so look up your model's time frame. [substeps] For high-end cars, you should consider replacing the fluid every 35-40 thousand miles. (B) [substeps] To flush your car, you would just press the " 3 " button to start your car. This button is located on the left side of the dashboard. (C) Not to mention that your keys may fall out of the system while you are driving. Make sure your tires can pump without fixing your tires to fast as they will be the next time you drive. (D) Check your user manual for the recommended flushing schedule. You will want to start with the range that the highest range on (vst) is, and go from there to lukewarm water.
A:
A