The Onstar system combines the Global Positioning System (GPS) satellite network with wireless technology to link the driver and vehicle to the center. There are currently two Onstar centers, in Michigan and North Carolina. Each is staffed by real human beings, 24 hours a day , 7 days a week . They are there to  offer immediate , real-time, personalized help to any query. Onstar has been used to ____________________ from emergency services to tracking stolen vehicles . If an Onstar-equipped vehicle is in a crash , the car automatically "calls" the center and an advisor immediately calls the vehicle to see what kind of assistance is needed.

(a) assist subscribers in everything

(b) help motorists install a GPS

(c) benefit passengers from anything

(d) reinforce services provided for passengers

(a)(c) 중에 고민했는데요. 답은 (a) 에요.

subscriber = 정기구독자 뜻 이외에도 전화서비스 가입자.음악회 정기 회원 등.

서비스를 꾸준히 이용하는 고객을 나타내더라구요.

전 단순히 신문구독자 이런뜻만 있는 줄 알고 (a) 는 답이 아니라고 했는데.

제대로 뜻 알고 보니 (a)가 답이 되구.

(c) 가 안되는 이유는 뭘까요?

무엇에서든 이익을 준다....이뜻인데 왜 안될까요? -_-?