If $\lim\limits_{x\to 0}\large\frac{\log(3+x)-\log(3-x)}{x}$$=K$ the value of $K$ is

Question

$(a)\;\large\frac{-2}{3}\qquad$$(b)\;0\qquad(c)\;\large\frac{-1}{3}\qquad$$(d)\;\large\frac{2}{3}$