What is the momentum of a 50 kg object moving at 30 km/hr?

Question

$\begin{array}{1 1} (a)\; \text{150 kgm/s} \\ (b)\; \text{1500 kgm/s} \\ (c)\; \text{2500 kgm/s} \\ (d)\; \text{250 kgm/s} \end{array}$