Tide

-10123timenoonmidnightheight of tide3 a.m0.1 ft11:30 a.m.1.8 ft5 p.m.0 ftTides at Henlopen Park on July 26
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 July 26 at Henlopen Park?
A. 1.8
B. 1.7
C. 2.2
D. 1.5
E. 1.9