Which of the following is a problem when comparing GDPs per capita between nations?

Select one:

a$.$ GDP per capita is likely overstated in LDCs due to families producing goods and services outside of the pricing system.

b$.$ Fluctuations in exchange rates affect differences in GDP per capita.

C$.$ GDP per capita is subject to greater measurement errors for IACs compared to LDCs$.$

d$.$ GDP per capita only measures income distribution.