Step-by-step explanation:
The ethical standard in this scenario is G. Conflict of Interest. Leo's action of accepting a free week's stay at the personal lodge of a government contractor creates a conflict of interest, as it could affect his impartiality in making decisions that involve the contractor.
The action was F. Unethical, as accepting gifts from a person or organization with whom the federal employee has official dealings can lead to biased decisions and is considered unethical behavior.