Tide

-10123timenoonmidnightheight of tide3 a.m0.1 ft12:30 p.m.2.1 ft7:30 p.m.0 ftTides at Virginia Beach on March 17
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 March 17 at Virginia Beach?
A. 2.1
B. 2
C. 1.8
D. 1.9
E. 1.5