Who invented the light bulb, generator, and other electrical devices?
louis pasteur
marie curie
ivan pavlov
thomas edison

Well Pasteur was more into medical advances and Curie was a chemist.  Also Pavlov was known for his study on dogs. This leaves you with the answer of Thomas Edison the inventor of the very first light bulb among his other discoveries.

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.