The best way to reduce traffic in our city is to build a metro subway system. Which of the following sentences can support this main idea.

1. Which of the following sentences can best describe the main idea of the text?

Review the following topic sentences for central paragraphs and find out their transition, reminder, and main idea. Despite this advantage, cars have many significant disadvantages, the most important of which is the pollution they cause.Transition: ___________________ Reminder: ___________________ Main idea: ___________________

Which of the following sentences makes the best main idea?

Review the following topic sentences for central paragraphs and find out their transition, reminder, and main idea. A further disadvantage is the traffic problems that they cause in many cities and towns of the world.Transition: ___________________ Reminder: ___________________ Main idea: ___________________