Shreya traveled 6 km from point A to reach point B. She took a left turn from there and traveled 5 km up to point C. She then took a right turn to reach point D at a distance of 6 km. After reaching point D, she turned left and traveled 3 km to reach point E. Finally, she turned left from there and traveled 12 km and stopped at point F. Find the aerial distance between point B and F.

• A. 11 km
• B. 8 km
• C. 10 km
• D. 9 km