Write the next sentence in the following story.

How to commute on earth day
Ask your company's human resources department if they are offering any incentives to commute differently on earth day.
Many companies offer transportation subsidies because they are not taxed. The following are popular ways that companies promote an eco-friendly commute on earth day and throughout the year :
They replace parking subsidies with transportation subsidies.

OPTIONS:
I. Businesses exchange food if they commute on earth day. The benefits on earth day offer are vastly enhanced, and many companies offer vacation packages where children can visit their family for free.;
II. These subsidies give investors control over the purchases, along with helping them to earn money. They also allow additional protection from any potential downturn.;
III. You can earn a 5% discount on parking. They significantly increase your commute on the road to your destination.;
IV. If your company gives parking spaces or other benefits to people with cars, ask what they can provide to people who take the bus or ride their bike. Companies provide people who carpool, use public transit and bike with subsidies.;. The answer should be
IV.