The US Dollar is en route for depreciation, analyze how the US dollar depreciation may affect the Canadian economy. (this is an essay question for Macroeconomics, any insight or links you could help me with would be appreciated.)

If one wants to know how the material well-being of the average person has changed over time in a given country, one should look at the?

A. level of real GDP.
B. growth rate of nominal GDP.
C. growth rate of real GDP.
D growth rate of real GDP per person?