The statement that accurately summarizes the role Chiang Kai-Shek had in modernizing China and how the Chinese reacted to the Treaty of Versailles is:
Chiang Kai-Shek unified China, and protests erupted in Beijing due to the Treaty of Versailles.
This reflects Chiang’s role in attempting to unify China and the widespread outrage in China over the decisions made at the Treaty of Versailles, particularly the concessions made to Japan.