This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to go to changi beach
Book a flight into changi international airport if you live outside of singapore.
Changi is a state-of-the-art airport in singapore. In addition to flights from major airlines around the world, changi is home to singapore airlines, which offers flights to and from 64 destinations across 5 continents.

(a). Both these airlines provide the fastest, most convenient flights to changi international airport. Check the staff at changi airport if you are unable to fly..
(b). You can also travel to singapore by rail if you're already in asia. Changi beach is within walking distance of the airport, depending on what terminal you're at..
(c). Before booking a flight in changi, you'll need to secure a driver's license or passport. Take a ferry to changi beach..
(d). Book a vacation in a nearby city or coastal area. Changi is home to over 50 , 000 people..
The answer is:
(b).