D. The US economy is the largest in the world when measured in GDP per person.
Explanation:
GDP per person also known as GDP per capita is a person's avg income in a given area per year. In this measure, the United ranks at 19th. So D is the correct choice
Lol didn't realize you asked this in 2016, hope this helps future students tho
Answer: The glacial-interglacial cycle is triggered by changes in Earth's orbit around the Sun, and, as a result, there is approximately 100,000 years between interglacials (or glacials).