Let $$f: R \to R$$ be defined by $$f(x) = \begin{cases} k - 2x, & \text{if } x \le -1 \\ 2x + 3, & \text{if } x > -1 \end{cases}$$. If $$f$$ has a local minimum at $$x = -1$$, then a possible value of $$k$$ is

A

$$0$$

B

$$-\frac{1}{2}$$

C

$$-1$$

D

$$1$$