The correct answer is A. Prewriting
Explanation:
The process of writing including essays is a complex one and because of this several stages need to be completed before you get to the final version of a text, this stages include prewriting, in which you decide the topic and purpose of a text and plan the content; drafting in which you write the first draft; revising and editing in which the first draft is revised an improved in different ways and publishing in which you get to the final version of a text or essay and can finally show this to others. Therefore, the phase of writing strategy that involves deciding on the topic and purpose of the essay is the prewriting stage.
