At What Value(s) of X Is the Function Discontinuous?
A)-1
B)0
C)1
D)-1, 0
E)0, 1
F)-1, 1

Multiple Choice

At what value(s) of x is the function $f ( x ) = \left\{ \begin{array} { l l } x + 2 & \text { if } x \leq - 1 \\x ^ { 2 } & \text { if } - 1 < x < 1 \\3 - x & \text { if } x \geq 1\end{array} \right.$ discontinuous?

A) -1
B) 0
C) 1
D) -1, 0
E) 0, 1
F) -1, 1
G) -1, 0, 1
H) None