\textbf{118.} The function $f(x) = \dfrac{ax^3 - bx^2 + 2}{ax^3 - bx + 2}$ is discontinuous at exactly two points and has exactly two asymptotes parallel to the coordinate axes. What are the values of $a$ and $b$?
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(1) $a = 0,\ b = 2$ \hfill (2) $a = 8,\ b = 10$
(3) $a = -2,\ b = 0$ \hfill (4) $a = -8,\ b = -6$
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