All of the following were achievements of the sumerian culture except
a. the 365-day calendar.
c. the arch.
b. cuneiform writing.
d. the great pyramid.

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.