Frank and Dinah are playing the PDG (prisoners' dilemma game) .If they both pick A,they both win $2.If they both pick B,they both lose $1.If one picks A and the other picks B,the one who picks A loses $1 and the one who picks B wins $4.If Frank picks B he is making the ___ choice.

A) mixed-motive
B) neutral
C) cooperative
D) competitive
E) individualistic