I think that it’s b because it’s kinda like what goes along with the question and what makes sense the most!!!!!
China's first great canal system, which created a northeast-southwest link from the Huang He (when the Huang had a northern course) to the Huai River, was built beginning in 605 during the Sui dynasty<span> (</span>
B. Learning to domesticate plants and animals changed the way
I'm pretty sure they only grew cotton
hope this helps
