Answer:
c. pivotal
Explanation:
a. typical and b. trivial is awkward. we are left with c and d. it would also be awkward to say that it was an unremarkable moment for the women's team to advance to win the title. Therefore, it must be pivotal (crucial importance).
I believe its B. if an author wants to establish ethos, or credibility in their writing, they want to make sure that their writing they want to make sure its factual and trust worthy.