Original sentence: He formed a company called National City Lines which quietly bought up public city transport companies and, his critics charge, he intentionally allowed these "daughters" to go bankrupt, by changing schedules, doubling or tripling fares and neglecting maintenance, ensuring that city dwellers had to buy cars.Some critics claim that Sloan was also instrumental in the demise of public city transport throughout the United States
Edited sentence: He formed a company called National City Lines which quietly bought up public city transport companies and intentionally allowed these "daughters" to go bankrupt, by changing schedules, doubling or tripling fares and neglecting maintenance.In this way he ensured that city dwellers had to buy cars.Sloan was also instrumental in the demise of public city transport throughout the United States