What signaled the beginning of the confucian scholar-official system of china during the han period?

The beginning of the Confucian scholar-official system of china was signaled by the efforts to recruit men that were trained in the Confucian classics. This was during the reign of the “martial emperor”. This is one of the most differentiating features of imperial China

this isn't a question and if you're going to list things be kind and use commas.

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