Answer:
A. Supply increased.
Step-by-step explanation:
If the supply curve shifts to the right, it means that more of the good or service is being produced at every price level. This indicates an increase in the overall supply of the good or service, as producers are able and willing to supply more at each price point. This increase in supply would generally lead to a decrease in price, assuming demand remains constant, as producers compete with each other to sell their goods.