The correct answer is: Will stay.
The sentence is about a future event, so we need to use a future tense. The simple future tense is formed by adding “will” to the infinitive of the verb. In this case, the verb is “stay”, so the simple future tense form is “will stay”.
The other options are incorrect because they are not in the future tense. Option A, “Will staying”, is in the progressive future tense, which is used to talk about an event that is happening or will be happening at a specific time in the future. Option B, “Will stays”, is in the simple present tense, which is used to talk about general truths or habits. Option C, “Stays”, is in the simple past tense, which is used to talk about events that happened in the past.
Here are some examples of how the simple future tense can be used:
- I will go to the store tomorrow.
- We will meet you at the park at 10am.
- The train will arrive at 3pm.
- The sun will rise at 6am tomorrow.