Answer:
It is true, quality cannot be a sometimes thing.
Subheadings give the reader an idea of what will be discussed in the section. For example, 'How Did WWII Shape Daily Life?' This subheading shows the reader that it will be about how WWII changed the daily lives of people. By the end of the section, the reader should have a firm answer to the question.
Yes, the book would’ve had only a slightly larger effect if it was organized differently
It has adverb clause that is (C)
