Suppose that two boys pull a sled with forces of 2.0 x 104 N at a 15° angle to the left of the center of the sled, and 1.8 x 104 N at an angle of 25° to the right of the center of the sled, respectively. What is the net pulling force vector on the sled?

A. 2.1 x 104 N at 80°

B. 2.1 x 104 N at 110°

C. 3.6 x 104 N at 86°

D. 3.6 x 104 N at 102°