A medium refers to the materials that are used to create a work of art. The plural of medium is media? I think that is it.
Because you not relying on, and reading from, a word-for-word text you are free to interact with your audience.
You are able to:
<span>make eye contact, respond, gesture <span>and move freely. </span></span>
I would def put c cause they both sound about right
