I doubt that one glass of wine will impair my judgment.

The correct answer is B: Harm. The statement implies skepticism about the effect of alcohol on judgment, suggesting that the person believes one glass of wine will not negatively impact their decision-making. "Harm" aligns with the potential negative consequences of impaired judgment from alcohol consumption. Choices A, C, and D are incorrect. A: "Change" does not directly address the negative impact on judgment. C: "Excuse" is unrelated to the idea of judgment impairment. D: "Improve" is the opposite of the intended meaning, as alcohol consumption typically does not enhance judgment. Therefore, B is the most appropriate choice given the context of the statement.