The answer is: B) Cars made it convenient to commute between cities and suburbs
Urban sprawl refers to the process of people moving from highly populated area into a more populated area.
Many workers in the city decided to do this by buying a house in suburban area and commute to their workplace every day.
Cars are considered to be a popular option for the to commute. If they commute by train or bus, They're restricted to a certain schedule that might not be convenience to them. Using cars enable them to commute whenever and wherever they want.
A. Iraq was responsible for the terrorist attacks of September 11,2001
