Indo-european language is thought to have originated around

D. Around the Caucasus Mountains

Explanation:

The Indo-European languages are believed to have originated around the Caucasus Mountains.

100% on edge

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.

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.