What does the phrase ‘text structures’ mean?

A. the way an author organizes the ideas and details in a piece of writing; text structures include compare-contrast; cause-effect, chronology and problem-solution

B. someone or something that contributes to an accomplishment, result or process.

C. he qualities shown by a character, such as physical traits (tall with brown eyes) or expressions of personality (kind or anxious).

D. the main division within a book