Will only give points if answers are
13. what were the most prized materials in ancient china?

14. what did the ancient chinese keep secret for hundreds of years?

15. why do you think this was advantageous (why did this give china an advantage? )

I can't answer 13, but 14 is silk, ancient China kept secret the way to make silk because (15) it gave them an advantage in trade (the silk road) because other countries would trade their goods for silk since china wouldn't tell them how to make it. Hope this helps!

the answer is d trust me

b. parliament was weaker than the monarchy.