Answer:
The answer is A Brazil grew economically and gained its independence by revolting against Spain
Step-by-step explanation:
As it says in the text that Brazil was one of the world's leading exporters of sugar they got more money so then, their economy would grow bigger so they would thrive. When an economy grows bigger they get supplied better as well so then it would be possible for them to fight back against Spain (and they did), and that would lead them to independence.