Answer:
The answer is: a. fair use.
Explanation:
Language in the court's decision suggests that noncommercial copying of recordings from a PC's hard disk to the Rio is a fair use under Sony v. Universal. The ruling reads:
In fact, the Rio's operation is entirely consistent with the Act's main purpose the facilitation of personal use. As the Senate Report explains, "The purpose of the Act is to ensure the right of consumers to make analog or digital audio recordings of copyrighted music for their private, non commercial use."
The answer is: a. fair use.