<span>Seeking personal freedom or relief from political and religious persecution.</span>
The Song Dynasty was first civilization in the world to use banknotes, aka paper money. They also were the first to use gunpowder, and the first to make a permanent navy. They were also the first to discern the North using a true compass. They had many, many firsts, which helped develop the world into how it is today.
Sorry, that this is only one half of your answer. But, I hope this still helps.
C IS THE ANSWER
an agreement for self- government
they created innovative methods of painting. they opposed the church and its orthodox ideas. they encouraged the spread of arts and education.