I'm taking a test and have to guess the right answer to the question after the article.
Article: (BEIJING, August 10)--The Beijing Dailyhas put together a number of tips for cost-efficient travel in Beijing.
 Subway transfer
"Transfer" is a word frequently used by volunteers helping visitors choose the best way of transport during the ongoing Beijing Olympics to save time.
On the seven subway lines now in operation, the transport authorities have set up a total of 16 transfer stations:
Transfer between Line 2 and Line 1 at Jianguomen and Fuxingmen stations;
Transfer between Line 2 and Line 5 at Chongwenmen and Yonghegong stations;
Transfer between Line 2 and Line 13 at Dongzhimen and Xizhimen stations; Dongzhimen station can also bring you to Beijing Capital International Airport via the Airport Line;
Transfer between Line 1 and Line Batong at Sihui and Sihuidong stations;
Transfer from Line 1 to Line 10 at Guomao station to reach Zhongguancun, the north Third Ring Road (going north and west) or Jinsong (going south).
Via Line 10, transfer to Line 8 at Beitucheng station to reach the Olympic central zone, where the "Bird's Nest" and other venues are located; transfer to Line 5 at Huixinxijie Nankou; transfer to Line 13 at Zhichunlu and Shaoyaoju stations; Sanyuanqiao station takes you to the airport via the Airport Line.
 From subway to bus
Beijing's subway system is thoroughly linked with bus routes.
The Beijing Railway Station, which can be reached via the Line 2 subway, has bus lines going north, southeast and to the West Railway Station, covering Chaoyang, Tongzhou, Daxing and other districts.
Xizhimen station is linked to many bus routes that go south and northeast. The long-distance bus routes near Dongzhimen station pass through Shunyi, Pinggu and other outskirts.
 Park and ride
Park and ride facilities allow commuters to leave their personal vehicles in a parking lot and transfer to a bus or rail system.
In Beijing, because of city planning and other factors, park and ride is limited to bus and subway stations beyond the Fourth Ring Road. Since the Line 5 subway began operating, a low-fare...
Question: Which of the following is TRUE?
Options: A: You can get to the Beijing Railway Station via the Line 5 subway.
B: Park and ride is limited to bus and subway stations beyond the Third Ring Road.
C: Drivers can spend a little money in parking their vehicles in the largest parking lot.
D: Drivers must park their cars in the largest parking lot and transfer to a bus or rail system.
C
The article describes the park and ride facilities, which allow commuters to leave their personal vehicles in a parking lot before transferring to another mode of transport. The drivers must pay for this service, so it is not free as implied by option C. Option D incorrectly claims that drivers are required to park their cars at a certain type of location when they use the services described above. Thus, neither options C nor D is correct according to the text given in the question.
Option A appears incorrect since there's no indication anywhere in paragraph 3 or 4 (which contains information on subway transfers) that Line 5 goes through Beijing Railway Station - however we can't be sure enough because even though back then Beijing had only 7 lines but today there might have been some extensions made into line 1 & 2 already; and.