Question

in addition to supporting the viewpoint, evidence in a psa should be
brief and entertaining.
detailed and humorous.
concise and credible.
lenghty and verifiable

Explanation:

Public Service Announcements (PSAs) aim to quickly communicate a critical message to a broad audience. Their evidence needs to be short (concise) to hold attention and trustworthy (credible) to persuade viewers to accept the message. The other options are incorrect: entertaining/humorous do not align with the serious goal of most PSAs, and lengthy/detailed content will lose the audience's attention quickly.

Answer:

C. concise and credible.