Correct Answer & Explanation
Option D
• This sentence refers to a future event that is part of a fixed schedule or arrangement.
• **Present Indefinite Tense** (arrives): Can be used for fixed future arrangements or schedules, especially for official events (e.g., 'The train leaves at 7 PM').
• **Present Continuous Tense** (is arriving): Can be used for definite future plans or arrangements (e.g., 'She is leaving for America next year').
• **Future Indefinite Tense** (will arrive): Is the standard way to express future actions.
• Given the context of a scheduled official visit, all three tenses can be grammatically correct and convey the intended meaning of a future arrangement.