GAME+THEORY-THE+PRISONERS+DILEMMA

What would you do?

Prisoner B: goes free || Prisoner B: 3 years || Each serves 2 years ||
 * || Prisoner B stays silent || Prisoner B betrays ||
 * Prisoner A stays silent || Each serves 1 year || Prisoner A: 3 years
 * Prisoner A betrays || Prisoner A: goes free