Tide

-10123timenoonmidnightheight of tide3.30 a.m.-1 ft11 a.m.2.1 ft7:30 p.m.-0.7 ftTides at Sandy Point on January 4
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 January 4 at Sandy Point?
A. 3.1
B. 2.8
C. 3
D. 3.6
E. 3.3