Continued growth in population nationwide has increased industrialization and urbanization as well. Due to an increase in population and urbanization, the number of vehicles has also increased. Every year the government try to reduce traffic from roads but still the number of vehicles is increasing as per the increased population demand.
Due to this reason, people are spending more hours behind the wheels as they got stuck in the traffic for so long.
Hence, the correct answer is "(a) More hours behind the wheel".
