In the south during the industrial revolution,

a. all southern farmers had enslaved workers
b. most plantations had fifty or more enslaved workers
c. about twenty-five percent of southern households had no enslaved workers
d. about twenty-five percent of southern households had enslaved workers

About 25 percent of Southern households had enslaved workers

Explanation: Slavery was the dominant labor system in the South but  the number of enslaved people on homesteads and plantations varied according to the wealth of the landowner.

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.