[单选题]
If you walk 6.0 km in a straight line in a direction north of 3):ezis9v r.g db ya3a8me v8qeast an 8umcv ;xt.fk4z/p:kyrrchc43vsu27d you end up 2.0 km north and several kilometers east. How many degrees north 7.c: s k;v4tfchu3mr cyk284u/vrxpz of east have you walked?
A. $19^{\circ}$
B. $45^{\circ}$
C. $60^{\circ}$
D. $71^{\circ}$
