Stalin unified the Soviet Union after the death of Lenin, although it should be noted that this "unification process" involved mass killings and deportations of people Stalin deemed to be enemies of the state.
I would also go with D.) Mutually assured destruction.
This whole idea mainly started during the Cold War. The United States and Soviet Union didn't want to use their nuclear weapons because they feared that if they did, the other side would retaliate. Ultimately, both sides would lose everything.
Answer:
King Akbar died on October 25, 1605. He died of dysentery in his capital of Agra.