Explanation:

Context: The speaker is expressing their current feeling of being unwell and contemplating what to do next.

Answer Explanation:

The correct answer is "will just stay" because it implies the speaker's decision to remain at home. Let's break down the answer further:

1. Future Tense: The use of the modal verb "will" indicates a future action or decision. In this case, it suggests that the speaker is considering a specific course of action.

2. Adverb "just": The inclusion of the adverb "just" emphasizes the simplicity or immediacy of the decision. It implies that the speaker does not plan to engage in any other activities or go anywhere else.

3. Verb "stay": The verb "stay" indicates the action the speaker intends to take. In this context, it means remaining or not leaving one's current location, which is at home.

4. Informal Tone: The use of the word "just" in this context suggests an informal tone. It indicates that the decision to stay at home is a straightforward and uncomplicated choice for the speaker.

Overall: The statement "I will just stay home" conveys the speaker's intention to remain at home due to feeling unwell. It implies a simple decision without any additional plans or activities.