In the virtual world of software, a class is ________ of an object

Which of the following statements is true of the economies of Australia and New Zealand?

A) There are restrictions in the free movement of people between the two countries. B) There are trade barriers and border restrictions between the two countries. C) There is a major challenge facing marketers in Australia regarding high marketing costs for distributing goods internationally. D) There has been an increase in the relative wealth of New Zealand due to an increase in prices for agricultural commodities.

Money left after paying taxes and buying necessities is referred to as _____

a. GDP per capita b. taxable income c. discretionary income d. disposable income