The action most likely a violation of the First Amendment is:
B. School board limits times for public comments to one hour for next week's meeting
While the First Amendment protects the right to free speech, it does not guarantee unlimited time for public comments. However, limiting the time for public comments can restrict the ability of individuals to express their opinions, especially if the time limit is seen as unfairly constricting meaningful speech.
Option C, while it describes potential outrage from a public official regarding criticism, does not indicate any action that violates First Amendment rights directly.
Thus, option B is the most fitting choice.