How did the events on this timeline affect the cold war ?

a. they had little impact, as the two superpowers shifted from the nuclear arms race back to a conventional arms race.
b. they increase cold war tensions in Europe as both nations increased military aid to their allies to make up for lost nuclear weapons
c. they lead to a chilling of relations between the two superpowers when these diplomatic maneuvers proved unpopular with the public in both nations
d. they reduce the Cold War tensions by limiting the threat each superpower posed to the other’s security