The purpose of adding transitional phrases during the revision phase of writing is mainly to :
connect ideas better.
clarify opinions more.
illustrate examples better.
emphasize arguments more.

The correct answer is A. Connect ideas better

Explanation:

Transitional phrases are phrases or words that show how ideas, paragraph or sections in a text are connected, in this way the reader can easily know in which way each idea is connected to one another and how multiple ideas construct the main idea in a text. Transitional phrases can show contrast, effect, sections of a whole, among others. Thus, adding transitional during the revision stage, in which the writer read the texts and makes changes, help the writer to connect ideas better and makes the relation between ideas explicit for the reader, which makes the text easier to understand.

the book's theme is the moral ambiguity of the iranian revolution, history of middle eastern relations and the process of growing up during war. it sheds light on the stereotypical views of middle eastern culture and religion.

the author explicitly portrays the issues of class disparities and racism continously throught the whole novel.

the relationship between parents and childrens, the abandonment of faith, modernity vs fundamentalism and class conflict are the 4 main panels that this novel englobes.

hope this , if you would like me to be more specific about a specific excerpt let me know : )