Three objects are visible in the night sky$.$ They have the following diameters $($in multiples of $d)$ and subtend the following angles $($in the multiples of ${}_0)$ at the eye of the observer. Object A has a diameter of $4d$ and subtends an angle of $2{}_0.$ Object B has a diameter of $3d$ and subtends an angle of $\frac{{}_0}{2}.$ Object $C$ has a diameter of $\frac{d}{2}$ and subtends an angle of $\frac{{}_0}{8}.$ Rank them in descending order $($greatest first$)$ according to their distance from the observer.

B$,$ A$,$C

C$,$ A$,$ B

B$,$ C$,$ A

A$,$ B$,$C