Based on this excerpt from the text, the monroe doctrine was a bold foreign policy statement largely because

a. it highlighted the power of latin american nations.
b. it developed a system of governing over the open seas.
c. it was supporting britain's call to action against most of europe.
d. it asserted u. s. power in the americas.

answer; andrew jackson approved nullification by signing it into law,and john calhoun opposed it saying it was unconstitutional;

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.