Answer:
If each suspected drug dealer follows a dominant strategy, he/she should - a. confess regardless of the partner's decision
Explanation:
In game theory, one player would be displaying strategic dominance if he or she chooses a dominant strategy, which promises a better outcome for this player regardless of the strategy chosen by the player he or she is playing against.
Here, each suspected drug dealer will have a better outcome if he/she confesses and testifies against his/her partner, because in result he/she gets the best possible outcome - immunity.