Which function is an extended function for f(x) = StartFraction x cubed + 3 x squared minus x minus 3 Over x squared minus 1 EndFraction that is continuous for all values of x?

g (x) = StartLayout Enlarged left-brace First row StartFraction x cubed + 3 x squared minus x minus 3 Over x squared minus 1 EndFraction, x not-equals negative 1, 1 Second row negative 2, x = negative 1, 1.
g (x) = StartLayout Enlarged left-brace First row StartFraction x cubed + 3 x squared minus x minus 3 Over x squared minus 1 EndFraction, x not-equals negative 1, 1 Second row negative 2, x = 1.
g (x) = StartLayout Enlarged left-brace First row StartFraction x cubed + 3 x squared minus x minus 3 Over x squared minus 1 EndFraction, x not-equals negative 1, 1 Second row 4, x = negative 1, 1.
g (x) = StartLayout Enlarged left-brace First row StartFraction x cubed + 3 x squared minus x minus 3 Over x squared minus 1 EndFraction, x not-equals negative 1, 1 Second row 4, x = 1.