Based on this early illustration of the town, what is one reason why Francis Lowell's partners might have chosen this area to build the factory town of Lowell?

a a river ran through the location and could be used to power the factories
b there were few trees to clear so constructing the town would be fast and easy
c the terrain was generally flat and could be used for growing cotton
d the climate seemed mild so the workers in the factories would be less affected by weather conditions

a a river ran through the location and could be used to power the factories