Tide

-10123timenoonmidnightheight of tide4:30 a.m.0 ft12:30 p.m.2.2 ft6:30 p.m.-0.8 ftTides at Bay Cove on April 18
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 18 at Bay Cove?
A. 3
B. 2.2
C. 2.3
D. 2.1
E. 3.3