Answer:
A. use of hyperlinks
Step-by-step explanation:
The use of the hyperlinks is what distinguishes hypermedia from linear multimedia.
Hypermedia will provide links to various other resources while multimedia will play/display those resources directly, in a single document, or Web page for example.
It doesn't mean one is better than the other, they're different approaches in terms of learning process for example. A bit like reading a book is different than watching a movie, they offer a different experience.