Which statement illustrates a synthesis of ideas?

To Kill a Mockingbird was immediately successful and has remained one of the most widely read books in history.
Although the books are set in very different time periods, they both explore the theme of friendship and betrayal.
George Washington was born in Virginia and, even as president, continued to think of himself as a Virginian first.
Nonfiction is a broad category that encompasses biographies, autobiographies, memoirs, informational texts, arguments, and newspaper and journal articles.