Answer:
B) The first approach, because it's the total dollars that matter
Step-by-step explanation:
you are comparing the income per capita so what matters is the nominal amount. You are not comparing standards of living nor competitiveness nor any real (not-nominal) value.
A. The statement is false, if you use purchasing power parity-adjusted exchange rate, you are note comparing "total dollars"
C. The statement is true, but usefull for another type of analysis
D. The statement is true, and would answer why would you convert Ghananian cedi to US Dollar and not the other way around