Which action reflects espousing a belief?

The action that reflects espousing a belief is promoting the belief as one's own. To espouse a belief means to adopt it, support it, or advocate for it actively. When someone promotes a belief as their own, they are not just passively accepting it; they are expressing commitment and aligning themselves with that belief, often with the intention of persuading others or bringing attention to it.

In contrast, rejecting the belief outright signifies a complete dismissal, which is not in line with espousing it. Critiquing the belief publicly involves questioning or analyzing it, which suggests a level of doubt or disagreement rather than ownership. Being indifferent to the belief indicates a lack of interest or concern, which also does not demonstrate active support or advocacy. Therefore, promoting the belief as one's own clearly indicates a personal alignment with and endorsement of it, making it the correct choice.