Hi, my name is Leah and I am in 5th grade. I need some help with my math homework and if you could help I would really appreciate that. :) 
 So the question is Logan estimated 5,861 + 1,278 using front-end estimation. What did he add?
 A. 5,000 + 1,000
 B. 5,000 + 2,000
 C. 6,000 + 1,000
 D. 6,000 + 2,000