A: CBB = Captive Born and Bred, meaning both parents were born and raised in captivity, as was their offspring.
CB = Captive Born, meaning the mother was collected from the wild, already pregnant and gave birth in captivity. The babies still stand a 50/50 chance of being born sick or showing signs of parasites like any bluey captured in the wild and shipped hastily overseas.
WC = Wild Caught. This can mean caught directly from the wild or raised in outdoor farms in Indonesia. Either type of Wild Caught stands the same chance of coming in sick and having a feral personality its whole life in captivity.