The ethical standard is D. Impartiality. The action is F. Unethical. Hunter's actions of delaying action on a request by an opponent of the official who had appointed him were unethical, as they violated the ethical standard of impartiality. As a federal employee or official, Hunter had a duty to remain impartial and not allow personal bias to influence his decisions or actions. By delaying action on the request, Hunter was not acting in a fair and impartial manner. Instead, he was allowing his personal bias against the opponent of the official who had appointed him to influence his actions. This behavior is not acceptable for a federal employee or official, and it undermines the integrity of the government. Therefore, Hunter's actions were unethical and not in line with the ethical standards expected of federal employees and officials.