Africa's independence provided_ but not_.

a: economic success, political freedom. b: political independence, economic success. c: political dependence, economic confusion. d: economic opportunity, freedom.

B: political independence, economic success.

Africa's independence provided self rule (political independence) from their colonizers, but they still struggled financially, for their economy is mostly a one-resource economy growing a cash crop, not something substantially needed to have a healthy economy.

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81 is a composite number.