Group Selection Is ___________________ but the Conditions That Make Group

Group selection is ___________________ but the conditions that make group selection likely are _________________.

A) theoretically possible; capable of evolving in a short period of time
B) theoretically possible; incapable of fashioning domain-specific mechanisms
C) theoretically impossible; possible only if a species is exposed to group living for sufficient periods of time
D) theoretically possible; rarely seen in nature