Question $2(1$ point$)$ Note: ${?}_{{?}_{?}}|$ is the greatest integer function a$)\underset{x{0}^{-}}{lim}f(x)=3$ b$)\underset{x{0}^{-}}{lim}f(x)=4$ c$)\underset{x{0}^{-}}{lim}f(x)=5$ d$)$ None of the above