Read the text and answer the question.
Natalie runs a small online business from her home in Savannah. She makes custom t-shirts for her customers. She does not have any employees, so orders are limited to ten shirts. She prints the images on the shirts, packages, and ships them herself. Most of her sales have come from within Georgia, with a few orders from other states.
Which transportation system does Natalie likely rely on the most to ship her products to her customers?
A.
the Interstate Highway System
B.
the Hartsfield-Jackson International Airport
C.
Georgia's railroads
D.
Georgia's deepwater ports