This is a weaken type question. The answer must be option C. My take :
Premise : A plane can be bought at one-third the cost of a high speed train line and can fly as fast anywhere. The train is a fixed linear system and the world we live in is spreading out in all directions and customers choose free wheel systems which do not have fixed routes.
Conclusion : Fixed train systems do not have any market
Pre-think : The author's conclusion is based on the fact that customers choose a free wheel
...
Premise : A plane can be bought at one-third the cost of a high speed train line and can fly as fast anywhere. The train is a fixed linear system and the world we live in is spreading out in all directions and customers choose free wheel systems which do not have fixed routes.
Conclusion : Fixed train systems do not have any market
Pre-think : The author's conclusion is based on the fact that customers choose a free wheel
...
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