A person with blood group ABRh^ - can safely donate blood to...

Blood group AB individuals have both A and B antigens on the surface of their red blood cells and lack anti-A and anti-B antibodies in their plasma. Because of the presence of both antigens, they can only donate blood to other individuals with blood group AB, as any other blood group would have antibodies against A or B antigens.

The Rh factor of the donor is negative ($\mathrm{Rh}^{-}$), meaning they lack the Rh antigen. An $\mathrm{Rh}^{-}$ individual can safely donate blood to both $\mathrm{Rh}^{+}$ and $\mathrm{Rh}^{-}$ individuals, provided the ABO blood groups are compatible.

Combining these conditions, an $\mathrm{ABRh}^{-}$ individual can safely donate blood to individuals with $\mathrm{ABRh}^{+}$ and $\mathrm{ABRh}^{-}$ blood groups.

From the given list, these correspond to B ($\mathrm{ABRh}^{+}$) and D ($\mathrm{ABRh}^{-}$).

Answer: B and D only