The average annual income of a nation's citizens is called Your
O GDP per capita
O GDP
O Quota
O Physical Capital

the answer is GDP per capita

Explanation:

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the quote by walter cronkite contributes to the central idea of the text by supporting the central idea. cronkite argues that what is deemed “right” for and in america may not be good for other countries. this supports the central idea of the text, that the vietnam war was unpopular in america for multiple reasons- including cronkite’s.