Answer:
It decreased the price of silver
Step-by-step explanation:
The impact of Spain's silver trade with Asia was that "It decreased the price of silver."
This is evident in the fact that Spain's silver trade with Asia led to the government of China to start using these silver to mine their own currency, given the fact they were the biggest buyer of the silver from Spain.
Thereby there is a great reduction in the value and demand of Silver.
Hence, in this case, the correct answer is "It decreased the price of silver."