Answer: B
Step-by-step explanation:
The Song invented movable type. Before then all the type (Chinese characters) had to be carved into a block of wood. Once the printing was done, the wood block was no longer useful.
A Song alchemist came up with a way to make individual characters from clay.
It resulted in the publishing of more books
It made knowledge more available to people
The Song were the first to issue paper money, instead of using heavy gold or silver coins.
The Song contributed the Merit system which was influenced by was influenced by Confucian ideas.
The Song made advances in transportation by inventing the magnetic compass.