Concept:Using the correct subordinating conjunction to introduce a time clause.
Explanation:The blank needs a word that means "at any time" or "at whatever time."
"Whenever" properly connects the idea of leaving with the time when the listener is ready.
The clause "you are ready" is a time clause, so it requires a time conjunction.
"As when" and "as ever" are not standard expressions in this sentence.
"Soon as" is incomplete because the correct phrase is "as soon as."
Thus, the most natural and grammatically correct completion is "We will leave whenever you are ready."
Answer:B. whenever