We have that
the formula of the Circumference
[tex]C=2\pi r[/tex][tex]\pi=\frac{C}{2r}[/tex]This ratio is Circumference: Twice the radius
_______
[tex]C=\pi d[/tex][tex]\pi=\frac{C}{d}[/tex]This ratio is Circumference: Diameter
The only ones that apply as we can see are B and D