Final Answer:
Sam, creating a presentation on his computer to show his classmates, is using c. Digital media.
Step-by-step explanation:
Digital media refers to electronic content that can be stored and processed by computers. In this context, Sam is utilizing digital media by creating a presentation on his computer. This involves using software tools to develop visual and multimedia content for educational purposes.
Unlike mass media, which reaches a broad audience through traditional channels like television or radio (option a), and traditional media, which includes non-digital formats such as print (option b), digital media encompasses content created and presented using digital technology. Sam's choice of creating a computer-based presentation aligns with the characteristics of digital media, making option c the correct answer.
Option C is the answer.