Solve the problem.
The graph of y = f(x) gives the speed limit y along a rural highway after traveling x miles. (i) Evaluate f(16), f(44), and f(48). (ii) At what x-values is the graph discontinuous?
A. 60, 60, 75; f(8), f(16), f(24), f(48), and f(56)
B. 67.5, 75, 90; f(8), f(16), f(24), f(40), and f(48)
C. 60, 75, 75; f(4), f(16), f(32), f(40), and f(48)
D. 75, 67.5, 75; f(16), f(24), f(40), f(48), and f(56)
Answer: D
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