Concept:The 1966 coup in Ghana was mainly caused by internal dissatisfaction with Nkrumah's government.Explanation:By 1966, Ghana faced serious economic problems, including heavy debt, rising prices, and shortages of basic goods.Many people also accused government officials of corruption and mismanagement of public funds.These conditions made the military and civilians lose confidence in Nkrumah's government, leading to the coup.Answer:Economic mismanagement and corruption.Correct option: C