A once a thesis statement is drafted it should not be

 a.) Once a thesis statement is drafted, it should not be revised
 b.) In short essays, the thesis statement usually appears in the first paragraph.
 c.) A good working thesis statement helps the writer maintain focus while drafting
 d.) The thesis statement articulates an essay’s controlling idea.
 a.) Correct.

A working thesis statement is a starting point - it often changes as the writing is developed.
Revision of the thesis statement is always an option. Therefore, this statement is false.
6 — Theses: Asking what and why
Understand how to ask "what" and "why" questions to improve a thesis statement
When asking “why” about a thesis statement, writers should consider the
“occasion for writing.” This includes thinking about __________.
 a.) the types of support they will use
 b.) the significance of their chosen topic
 c.) their purpose and intended audience
 d.) their personal ability to create an argument
 c.) Correct.
The "occasion for writing" considers the rhetorical situation, which includes purpose and
audience.
7 — Narrowing Your Thesis
Understand strategies for narrowing a thesis statement.