How Did the Country of Afghanistan Begin

How did the country of Afghanistan begin?

A) Osama Bin Laden founded it in order to save himself from other countries and to find a safe haven for Al Qaeda.
B) A man united several Pashtun tribes between Pakistan and Iran, then in 1919, they gained their independence from the British.
C) It came about as a result of World War II - Afghanistan was controlled by Russia, but gained independence peacefully.
D) It was founded as a Muslim country at the breakup of the British Indian Empire.