Third parties have been successful in all of the following roles except: a. supporting a specific issue b. forming as protest groups c. impacting election results d. becoming a dominant party

i just answered it

explanation:

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.