Why is Atlanta's longest serving mayor, William Berry Hartsfield, known as Atlanta's "father of aviation"?

Responses
A He was an accomplished pilot who began Delta airlines.He was an accomplished pilot who began Delta airlines.
B He was a colleague of airplane inventors Orville and Wilbur Wright.He was a colleague of airplane inventors Orville and Wilbur Wright.
C He developed the C5 mass transport airplane for Georgia's Lockheed Aeronautical plant.He developed the C5 mass transport airplane for Georgia's Lockheed Aeronautical plant.
D He believed that an airport for Atlanta would be a key to the city's economic prosperity.

D He believed that an airport for Atlanta would be a key to the city's economic prosperity.