The United States supported the Mujahideen in the Soviet-Afghan war.
I think A but I`m not a hundred % sure. :)
They kept people afraid for their lives and of that of their loved ones. SO if they were afraid they would not speak out against the government.
It would be "Lake Victoria" that is the source of the White Nile River, although it should be noted that the exact point at which the two water sources converge is slightly disputed.