48. It can be inferred that the participants of the Marathon of Sands___________.
(A) always come back for a second try to win a sense of accomplishment
(B) will feel bored when running the race because viewers are not allowed to join the running
(C) can rest at a beautiful oasis overnight for a good sleep and abundant supply of water
(D) may learn to work through challenges in life and understand more about their limits as well