Contextual Applications of Differentiation · Hard problem

A chemical reaction's concentration during the first moments is modeled by $C(t)=\dfrac{\ln(1+6t)}{t}$ mol/L for $t>0$ minutes, which is undefined at $t=0$. Find $\displaystyle\lim_{t\to0^+}C(t)$, the concentration's limiting value as the reaction begins.