Which characteristic is common to the maya, aztec, and inca civilizations?

I had this question on a test and the options were

They worshipped many gods

They used iron tools

They developed a writing system

They created chinampas

The one that is bold is the one I chose

where are the answers

explanation:

be cause we need them

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.