The correct answer is A. The writer narrows in on a working thesis.
Step-by-step explanation:
In the prewriting stage, the writer defines basic elements of the text such as topic, thesis, and main idea. Also, during this stage, the writer plans the content that will be included. This includes creating a thesis (a statement that shows the perspective of the author) and narrow it. Indeed, the creation and narrow of a thesis is one of the first steps in prewriting because only after there is a working thesis the writer can continue planning the content of the text. Also, others such as writing the introduction or revising the argument occur during or after writing the text.