The dragon backbone pump was invented during the Song dynasty. What does a dragon backbone pump do? a. helps doctors treat bone
illnesses b. helps pump water out of flooded boats c. allows one man to scoop water from one place and dump it into an irrigation canal d. automatically pumps arrows through a long tube Please select the best answer from the choices provided A B C D
I believe it is B:Helps pump water out of flodded boats and if thats not right then it should be D sorry if im wrong i just woke up and if i right then please grant me brainliest-Lucina
