The correct answer is letter (A)
Explanation: This is the Law of Supply and Demand, is the relation of the sellers and the buyers that can affect the price, if a product has a good selling it may the price decrease, if the product has a low selling make the price increase.
Law of Supply and Demand is responsible for balance of a economy, it can make increase or decrease prices in various ways.
I think it’s make the nation’s laws. Please correct me if I’m wrong.
I think it would be D lack of rain