Which of the following is correct for ${\mathrm{CsBr}}_3$?

• A

  It is a covalent compound

• B

  It contains ${\mathrm{Cs}}^{1+}\text{\hspace{0.17em}and\hspace{0.17em}}{\mathrm{Br}}^{-}$ ions

• C

  It contains ${\mathrm{Cs}}^{+},{\mathrm{Br}}^{-}$ and lattice ${\mathrm{Br}}_2$ molecules.

• D

  It contains ${\mathrm{Cs}}^{+}\text{\hspace{0.17em}and\hspace{0.17em}}{\mathrm{Br}}_{ }^{-}$ ions