Find Numbers $a$ And $b$ , Or $k$ , So That $f$ Is Continuous at Every Point

Multiple Choice

Find numbers $a$ and $b$ , or $k$ , so that $f$ is continuous at every point.
- $f(x) =\left\{\begin{array}{l}10 x+9, \text { if } x<-2 \\ k x+8, \text { if } x \geq-2\end{array}\right.$

A) $\mathrm{k}=4$
B) $\mathrm{k}=11$
C) $\mathrm{k}=-4$
D) $\mathrm{k}=\frac{19}{2}$