Answer:
D.
Explanation:
A topic sentence is defined as "a sentence that expresses the main idea of the paragraph in which it occurs."
A topic sentence acts like a guide to the readers and helps them to know the main idea of the writer. A topic sentence also functions as a support to a thesis statement.
Settle, for example : if you resolve a problem you have settled the problem.
-They are typically long documents and may have a table of contents.
