Final answer:
John Stevens resigned as the chief engineer of the Panama Canal project after President Theodore Roosevelt's visit to the canal zone in 1906.
Step-by-step explanation:
The question 'Who quits after Teddy Roosevelt makes a trip to visit the canal zone?' refers to a historical incident related to the construction of the Panama Canal. The correct answer to this question is A) John Stevens. John Stevens was the chief engineer of the Panama Canal project and he resigned his position after President Theodore Roosevelt's visit to the canal zone in 1906.
Theodore Roosevelt's influence and decisions were vital in the construction of the Panama Canal. His visit to the construction site underscored the importance of the project to his administration. Theodore Roosevelt and William Howard Taft were instrumental figures in the early 20th century, with Roosevelt being known for his 'big stick' foreign policy and Taft for his more cautious approach. Roosevelt's support helped Taft win the presidency in 1908, but the two would later have a political split, leading to Roosevelt's run as a Progressive in the 1912 election.