Q: 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 muffle a fan [title] Check that the fan's blades are evenly spaced and aligned. [step] Bend any blades out of position back into place. Do this very carefully as the blades could snap. <sep> (A) [title] Oil a fan's motor bearings if you hear a grinding, ticking or rubbing noise as the fan spins. [step] Use a non-detergent motor oil that is lightweight. (B) [title] Find a steady, sturdy object to hold onto. [step] A box, coffee can, or some other kind of flat surface will make it much easier to hold the fan. (C) [title] Shut up any other fans that may be in the room. [title] Turn off all other fans in the room. (D) Also look at the connectors on the blades. Note if your blades are well grooved or not.
A:
A