What happens next in this paragraph?

How to visit denver, colorado 
Arrive in denver. 
The simplest way to get to denver is via denver international airport. The airport is located approximately 30 minutes from the city center, but taxis and shuttles are readily available to take you downtown or wherever your accommodations are located.
Pick your answer from: a. Note that denver is a sprawling city. To take full advantage of the city's attractions, renting a car is strongly recommended, as public transportation is limited to buses and a small electric train system.. b. Press the " airfare/payment advance " button on the internet page. This will guide you onto the denver tip counter near the gates.. c. Only stay at the denver international airport, unless otherwise specified by your airline, which will vary depending on the place. If you live in san francisco, you can book international flights with one of the following bus routes: bus bus, subway, subway car or bus train.. d. To access denver international airport, follow the signage to where the gates at either gate are (front entrance to paved roads that surrounding flight terminals) and enjoy the views of the downtown terminal (front entrance to suburban or suburban highways). From denver international airport gates you will need to pay a security fee to board a plane ticket..
a.