Answer:
The "A" option is correct.
Step-by-step explanation:
As Fabricio knows that the audio files don't need to be completely downloaded to be played, it is clear that the radio station uses a streaming player.
A streaming player can download audio (or video) data at a faster speed than it plays it, so if the connection fails, the data is not lost, as the player saves it in a buffer (a temporal space in memory). That gives you the impression that the file is already downloaded.