Answer:
A.
Step-by-step explanation:
The purpose of a thesis statement is to express a position about a topic; moreover, this statement shows the main point of the author, and in the process of writing is an essential element as this defines the supporting ideas that will be included, the evidence, and event the structure of the text.
Besides this, the thesis is created after the topic was selected and one of the ways to do this is to think about the position or point of view you have about the topic. In this context, one helping question would be "What am I trying to say about that topic?" because as it was mentioned before the thesis statement is the position about the topic or what the author feels/thinks or says about the topic.