Which of the following BEST describes George Perkins Marsh's contributions to the field of geography? (2 points)
A. He placed an emphasis on using the scientific method to answer questions about geography.
B. He was one of the first people to lead a successful expedition to the North Pole.
C. He developed the coordinate system of latitude and longitude.
D. He identified a connection between human actions and environmental degradation.
E. He invented a navigation device that was reliable at vhf sea.