A 75 kg hockey player is skating at a speed of 4.0 m/s towards the north. He is abruptly stopped by a defenseman skating towards him due south. Determine the impulse exerted on the hockey player by the defenseman.

• A. 4.5$\times$10² kg$\cdot$m/s, due North
• B. 3.0$\times$10² kg$\cdot$m/s, due South
• C. 2.0$\times$10² kg$\cdot$m/s, due North
• D. 1.1$\times$10² kg$\cdot$m/s, due South