In Recent Years, the Price of Smartphones Has Fallen, While

Multiple Choice

In recent years, the price of smartphones has fallen, while the quantity exchanged of smartphones has risen. We can conclude that this is most likely a result of

A) a decrease in supply while demand remained constant.
B) an increase in demand while supply remained constant.
C) an increase in demand that exceeded an increase in supply.
D) an increase in supply that exceeded an increase in demand.