The correct answer is A. Silver from Spanish America financed imports from Asia by the Portuguese.
During the colonial period, the Portuguese and Spanish empires were intertwined through trade and finance. The riches obtained by Spain from its colonies in the Americas, particularly silver from mines like those in PotosÃ, became crucial for financing trade routes and imports from Asia, which were primarily controlled by the Portuguese. This economic relationship helped both empires support their colonial ambitions while enriching their respective economies.