Read the following excerpt from a passage about the evolution of copyright law:
'Copyright law has historically struggled to adapt to new technologies. For instance, the invention of the player piano roll in the early 20th century forced courts to decide whether mechanical reproductions constituted "copies" of sheet music. Later, the rise of the photocopier highlighted the need for "fair use" exceptions, as scholars required the ability to duplicate small portions of texts for research without explicit permission. More recently, the advent of peer-to-peer file sharing demonstrated how decentralized networks could completely bypass traditional distribution channels, challenging the very enforceability of copyright.'
Based on the passage, match each contextual example to the specific claim it is used to illustrate.
- The player piano rollHighlights the challenge of determining whether a new form of mechanical reproduction qualifies as a 'copy'.
- The photocopierIllustrates the need for legal exceptions that permit limited copying for scholarly research.
- Peer-to-peer file sharingDemonstrates how decentralized networks can bypass traditional distribution and threaten enforcement.