What challenges did leaders of the song dynasty experience

Northern neighbors crossed into Northern China and occupied large Chinese territory. Song rulers were forced to move the imperial court south to Hangzhou, the Song also lost control over Tibet. Mongols also overthrew the Song and set a new Mongol dynasty

Explanation:

the answer is d. tariffs were raised by america's trading partners after the smoot-hawley tariff act, decreasing exports, and declining job rates.

answer; ///i believe that the correct answer is ; hieroglyphs or glyphs; the maya script, also known as maya glyphs, was the writing system of the maya civilization of mesoamerica; as always plz check first..good luck