Here is the completed passage with the correct sentence fragments:
William Howard Taft became president in 1909. His foreign policies differ from Roosevelt’s. Instead of military force, he often relied on the country’s growing economic power. This approach to foreign policy became known as Dollar Diplomacy. Taft decided to “substitute dollars for bullets” to secure markets and opportunities for American businesses. Roosevelt's policy had been labeled as the Big Stick policy, which was based on the idea that diplomacy has to be backed up with military force.