A 60 kg rower is paddling a 30 kg canoe with a 2 kg paddle at a constant speed of + 10 m/s. If she loses her grip on the paddle and it flies backward with a velocity of -20 m/s, what is the final momentum of the boat and rower?

A+10 kg-m/s

B+10.7 kg-m/s

C+960 kg-m/s

D+975.2 kg-m/s