Answer:

To understand the correct answer, let's break down the sentence and discuss the grammar rules involved.

Subject-verb agreement:
The subject of the sentence is 'you', which is a second-person singular pronoun. Therefore, the verb should be in the second-person singular form.

Tense:
The sentence is in the future tense, which means that the action has not yet happened.

Continuous tense:
The sentence is asking about an action that will be ongoing at a specific point in the future. Therefore, we need a continuous tense.

Now, let's look at the options given:

a) Will you wait
b) Will you be waiting
c) Have you been waiting
d) Will you have waited
e) Will you have been waiting

Option (a) - Will you wait - is in the simple future tense, which means that the action will start and end in the future. However, the sentence is asking about an ongoing action in the future, so this option is incorrect.

Option (b) - Will you be waiting - is in the future continuous tense, which means that the action will be ongoing at a specific point in the future. This option is grammatically correct, but it does not fully convey the meaning of the sentence.

Option (c) - Have you been waiting - is in the present perfect continuous tense, which means that the action started in the past and is still ongoing at the present moment. This option is incorrect because the sentence is asking about a future action.

Option (d) - Will you have waited - is in the future perfect tense, which means that the action will be completed before a specific point in the future. This option is incorrect because the sentence is asking about an ongoing action in the future.

Option (e) - Will you have been waiting - is in the future perfect continuous tense, which means that the action will have been ongoing before a specific point in the future. This option is grammatically correct and conveys the meaning of the sentence accurately.

Therefore, the correct answer is 'Will you have been waiting'.