Tide

-10123timenoonmidnightheight of tide5.30 a.m.0.3 ft11:30 a.m.1.9 ft6:30 p.m.0 ftTides at Henlopen Park on June 10
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 June 10 at Henlopen Park?
A. 1.9
B. 1.6
C. 2.1
D. 1.2
E. 1.8