The Figure Below Illustrates the Supply and Demand Schedules of Swiss

Multiple Choice

The figure below illustrates the supply and demand schedules of Swiss francs in a market of freely-floating exchange rates.
Figure 12.1 The Market for Francs

-Refer to Figure 12.1.Should Swiss labor productivity rise,leading to a decrease in Swiss manufacturing costs,there would occur a (an) :

A) Increase in the supply of francs and a depreciation of the dollar
B) Increase in the supply of francs and an appreciation of the dollar
C) Decrease in the demand for francs and an appreciation of the dollar
D) Increase in the demand for francs and a depreciation of the dollar