The Panama Canal is a key waterway that connects the Atlantic Ocean to the Pacific Ocean through the Isthmus of Panama. It allows ships to save the long and dangerous trip around the southern tip of South America.
- (A) Between Yokohama and Vancouver: This route does not use the Panama Canal.
- (B) Between Auckland and Honolulu: This route does not involve the Panama Canal.
- (C) Between San Francisco and New York: This route does indeed pass through the Panama Canal as it connects the west and east coasts of the United States.
- (D) Between London and Aden: This route does not pass through the Panama Canal.
Thus, the correct answer is (C), as the Panama Canal is used for shipping between the east and west coasts of the United States, including the route from San Francisco to New York.