[单选题]
If you walk 6.0 km in a straightef -1su/g-u c oazm(d+ line in a direction north of east and yerjr-2n6t 9 zi+60p(qlu0k)hk rknv hou end up 2.0 km north and several kilometers east. Hov0trek)-92z pij+(khun6n q6lh 0r rkw many degrees north of east have you walked?
A. $19^{\circ}$
B. $45^{\circ}$
C. $60^{\circ}$
D. $71^{\circ}$
