Correct Answer:
C. will be
Explanation:
The correct answer is will be because the sentence refers to a specific continuous action happening in the future.
- Step 1 (Identify Timeline): The phrase 'next Sunday' lets us know that this event has not happened yet and belongs in the future tense.
- Step 2 (Future Continuous): To show an action that will be ongoing at a specific time tomorrow or next week, we use the future continuous form: will be + verb-ing.
- Incorrect Options:
- be is a root verb and cannot stand alone here without a helper verb like 'will'.
- has been is incorrect because it describes an action that started in the past, not the future.
- is is incorrect because it indicates the present tense right now.