I want to know the answer to the following question:
What happened in Portugal that contributed to Guinea-Bissau's independence?
All the background I'm provided with is that "After the country became independent from Portugal in 1974 due to the Portuguese Colonial War and the Carnation Revolution, the rapid exodus of the Portuguese civilian, military, and political authorities resulted in considerable damage to the country's economic infrastructure, social order, and standard of living.". Is that enough to answer the question?