The transition metal complex trans-diamminedichloropalladium(II), trans-[Pd(NH3)2Cl2]\text{trans-}[Pd(NH_3)_2Cl_2]trans-[Pd(NH3)2Cl2], is an active catalyst used in Suzuki-Miyaura cross-coupling reactions. Which of the structures represents a stereoisomer of this complex?

Structure A
Structure B
Structure C
Structure D