What is the half-life of a reaction with $[A]_o = 109\;M$, $[B]_o = 1\;M$, $k' = 45M^{-1}s^{-1}$ ?

Question

$\begin{array}{1 1} (A) 1.41 \times 10^{-4}\;s \\ (B) 4905\;s \\(C) 0.141 \times 10^{-4}\;s \\ (D)490.5\;s \end{array}$