Answer:
B. reached when each player choose the best strategy for himself and for the group.
Step-by-step explanation:
Nash equilibrium -
It is the type of method for a game , where there is no incentives or perks involved in the game , so that the people do not divert from the main focus, is referred to as nash equilibrium.
This type of game is a type of fair competition , so that each and every person can show their actual potential , without being bias.
Hence , from the given statements the correct statement for nash equilibrium is b.