Consider Two Current-Carrying Circular Loops $\vec { B }$ Field at the Center of the Smaller Loop Is

Consider two current-carrying circular loops.Both are made from one strand of wire and both carry the same current,but one has twice the radius of the other.If the $\vec { B }$ field at the center of the smaller loop is $\vec { B }$ ₁,what is the $\vec { B }$ field strength at the center of the larger loop?

A) 8B₁
B) 4B₁
C) 2B₁
D) B₁/2
E) B₁/4