Which of the following conclusions is not supported by the Three-Sector-Model?

a. An increase in a nation's supply of goods and services raises the amount sold per time period and lowers the nation's GDP Price Index.
b. An increase in the demand for a nation's currency in the foreign exchange market raises its international value.
c. An increase in a nation's real risk-free interest rate increases the willingness and ability of lenders/savers to supply credit to the real loanable funds market, and it decreases the willingness and ability of individuals and companies to borrow/invest.
d. An increase in a nation's demand for goods and services within the Classical range usually leads to a strong decrease in the unemployment rate.

.D