PT60.S4.Q14 (P3) - the author uses the word "immediacy"

cacrv567

Why must the answer to relate to the audience? Is it just because the preceding sentence was regarding how the audience could react? Because the specific sentence in question is in reference to "participants," I assumed that it would involve the actors, and that's why C was appealing to me. Any further insight would be greatly appreciated - thanks!
https://7sage.com/lsat_explanations/lsat-60-section-4-passage-3-questions/