User blog comment:Gearslover01/One Question About the BioShock Infinite Ending/@comment-158.130.223.195-20130426190954

These Elizabeths are all from different realities, who have succeeded in destroying the Siphon, and achieving complete control over the ability to open and close, create and destroy tears at will. They've all discovered the truth behind Comstock's origin, and know that the only way to prevent succeeding him and attacking New York is to kill Booker at his Baptism.