Final answer:
The city ordinance prohibiting the sale of publications criticizing government actions and policies is likely an unconstitutional restriction of speech.
Step-by-step explanation:
The city ordinance that prohibits the sale of publications criticizing government actions and policies is most likely an unconstitutional restriction of speech (option b). According to the First Amendment, the government cannot limit freedom of speech or expression unless there is a compelling government interest and the restriction is the least restrictive means available to achieve that interest. In this case, the ordinance is content-based because it specifically targets materials that criticize the government. Content-based restrictions are subject to strict scrutiny, meaning they are often found unconstitutional.