In December $2016$ the U$.$S$.$ dollar was trading at $113$ yen per dollar on the foreign exchange market. In September $2017,$ the U$.$S$.$ dollar was trading at $110$ yen per dollar.

What events in the foreign exchange market could have resulted in this change in the value of the U$.$S$.$ dollar?

A$.$ an increase in the Japanese interest rate and a rise in the expected future exchange rate of the U$.$S$.$ dollar

B$.$ an increase in the Japanese interest rate and a decrease in the U$.$S$.$ interest rate

C$.$ a decrease in the U$.$S$.$ interest rate and a decrease in the Japanese interest rate

D$.$ a rise in the expected future exchange rate of the U$.$S$.$ dollar and a decrease in the Japanese interest rate

These events that resulted in this change in the value of the U$.$S$.$ dollar changed $$

A$.$ only the demand for dollars

B$.$ both the demand for dollars and the supply of dollars

C$.$ only the supply of dollars