The cubic unit cell structure of a compound containing cation M and anion X is shown below. When compared to the anion, the cation has smaller ionic radius. Choose the correct statement(s).

A

The empirical formula of the compound is MX.

B

The cation M and anion X have different coordination geometries.

C

The ratio of M-X bond length to the cubic unit cell edge length is 0.866.

D

The ratio of the ionic radii of cation M to anion X is 0.414.