Answer:
C. Yangtze and Huang He
huang he is also known as yellow river
In general, the Industrial Revolution, which originated in Great Britain, opened up lots of new opportunities for employment for people, which created a solid middle class.
can you specify what "dn" is so we can get you the right answer?
I can’t see any possible options but secondary sources and online sources should be double checked and avoided if possible. few secondary sources are trustworthy like textbooks