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 check the real bitrate of audio files [title] Understand the bit rate and its affection on the audio quality. [step] Though audio quality depends on many elements such as frequency, compressing method, up-scaled, etc. , but for almost audio files downloaded on the internet, if the bit rate is high (~ 128 kbps or higher), then the sound will be clearer and " more comfortable " to hear. <sep> (A) Video quality can also be affected based on sound, and you should check the rest for your information. [title] Convert the distinct sound from the selected file into your own file format. (B) If the bit rate is low, you may hear it blurring, noisy and unclear. [title] Understand that the bitrate tag of audio files may not tell the true bitrate. (C) To slow this down, give a slight undertone in your tone. ( ex: with hp this sounds like 3/16, and then " about ethe mugin. (D) [substeps] If you're using an external cd, try using the setup as a guide. A good lead recording allows you to check the second batch of files.
A:
B