TRANSPORTATION HAS BEEN MADE MUCH EASIER THANKS TO THE INVENTION O...

46. Transportation has been made much easier thanks to the invention of cars. However, cars are the greatest

contributor of air pollution.

A. Although the invention of cars has made transportation much easier, cars are the greatest contributor of air

pollution.

B. However easier the invention of cars has made transportation, it is cars that are among the greatest

contributors of air pollution.

C. The invention of cars has made transportation much easier, but cars are among the greatest contributors of air

D. Although the invention of cars has made transportation much easier, people use cars to contribute to the

pollution of air.