B) unsuccessful
The lost colony of Roanoke is the best example of this.
C, Shot heard around the world.
Hope I helped!
With the Aryan invasion of South Asia, lot has changed, or modified in the way of life of the people in this region. The Aryans managed to merge the culture and beliefs with the Dravidian ones, and thus creating the modern Hindu religion which is essential part of the lives of the people in South Asia. Also, they created the caste system, which led to specialization in work of the people, and even though nowadays it is officially forbidden, in practice, it is still in use. And very important, they created the Indian ethnic identity, with their genetic contribution, were a new ethnicity was formed from two totally different ethnic groups in appearance.
That process was called VIETNAMIZATION.
President Nixon was the one who instituted the Vietnamization policy, which emphasized that the United States must empower South Vietnamese forces to assume more combat duties.
By the time the US was shifting emphasis to this sort of policy, it was too late to stave off the victory of the North Vietnamese and Viet Cong forces. The US eventually withdrew its forces from Vietnam in 1973, and by 1975, Saigon (in South Vietnam) fell to the North Vietnamese communist forces.
My educated guess would be A.
The Americans kept on failing the circular shape of the wheel and that's why they didn't use the wheel.
