Yes, it’s 100% B pls give brainliest if you don’t mind
Basically, big countries started rapidly industrializing and since they needed resources such as coal and oil and money they needed then to conquer other countries and take it from them. This led to imperialism where European countries would colonize Africa, for example, and take their natural resources back to the European country so that they could process it and develop more.
I would say 30,000 cause all the next developments were from the 1860's forward and that is when huge growth happened, after 1860.
For his recognition of his bravery and service during the Revolution
