The only answer I found was: The ancient Chinese kings maintained control of their dynasties throguh military means.
You probably go to connections accademy. I do too.
This question is in the Journey Across Time text book on page 231. The answer is on pages 225 - 231.
Besides the two answers above me, I managed to find a reasonable answer:
"Rulers became powerful because they controlled land and had strong armies."
This is all I could find, hope this benefits others who wonder what the answer is!
The correct answer is D. Many people lost their money because banks didn't protect it.
So kimmy you can be like uhhhhhhh yahhhhhhh and tthen that is why
1.D - 2.B - 3.D - 4.A - 5.A - 6.A - 7.B - 8.A - 9.B - 10.A - 11.D - 12.D
B. Joseph Smith
Hope this helped