Answer:
A. I want to become a playwright.
Step-by-step explanation:
Sentence B is a conditional sentence expressing unreal condition with an unrealistic outcome in the present or future.
Sentence C uses the verb mood in the imperative. It forms a command or request.
Sentence D uses the verb mood in the subjunctive. It is the form of a verb which is used to express a wish.
Sentence A uses the verb mood in the indicative because it expresses a statement.