Final answer:
Option 2, which contains Dan Rather's praise 'Pure, unvarnished, courage,' best supports the statement that Brayden's bravery in delivering his speech received glowing reviews.
Step-by-step explanation:
To support the statement that Brayden's bravery and determination in delivering his speech brought glowing reviews, we can look at the given options. While options 1, 3, and 4 provide some context about the situation, Option 2 explicitly captures the essence of the public's admiration for Brayden's actions. The statement by Dan Rather, "Pure, unvarnished, courage," tweeted by a renowned journalist and former television anchor, directly compliments Brayden's brave act of public speaking and supports the notion of Brayden receiving glowing reviews.