The graph above shows the height of the tide, in feet, above or below a baseline. Which of the following is closest to the difference, in feet, between the heights of the highest and lowest tides on April 16 at Henlopen Park?
A. 2
B. 1.9
C. 1.5
D. 1.7
E. 1.4
A. 2
B. 1.9
C. 1.5
D. 1.7
E. 1.4