In 2015 the gpa's deepwater ports and barge terminals supported more than 352,000 jobs throughout the state, and the agency contributed $2.5 billion in state and local taxes to georgia's economy.
—new georgia encyclopedia, 2016

based on the text, which statement is most likely true?
a.
the average population of port cities is larger than inland cities in georgia.
b.
the average number of workers in port cities is the same across georgia.
c.
water transportation plays a significant role in the economy of georgia.
d.
water transportation is the leading provider of jobs in the state of georgia.