Classify the following organisms based on the presence of a true coelom: $Spongilla$,$Planaria$,$Scorpion$,$Birds$,$Ascaris$,$Nereis$.
- AAcoelomates: $Spongilla$,$Planaria$; Pseudocoelomates: $Ascaris$; Coelomates: $Scorpion$,$Birds$,$Nereis$.
- BAcoelomates: $Spongilla$,$Ascaris$; Pseudocoelomates: $Planaria$; Coelomates: $Scorpion$,$Birds$,$Nereis$.
- CAcoelomates: $Spongilla$,$Planaria$,$Ascaris$; Coelomates: $Scorpion$,$Birds$,$Nereis$.
- DAcoelomates: $Spongilla$; Pseudocoelomates: $Planaria$,$Ascaris$; Coelomates: $Scorpion$,$Birds$,$Nereis$.
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