The bolded word "until" is being used by showing when they are leaving...
The infinitive is functioning as the predicate nominative. "Plan" is the subject (with Joel's as a modifier for "plan"). Since "is" is a linking verb, it is a predicate nominative and not a direct object.
The answer would be a because he wanted you to know the difference between each character
Answer:
cryptanalyst
Explanation:
that is the answer which I know