이게 문제예요,

35. 글의 흐름으로 보아, 주어진 문장이 들어가기에 가장 적절한 것은?
then the brothers leapt onto the camels and charged toward the finish line.

an old arab sheikh wanted to will his fortune to one of his two sons and so he made a proposition. his two sons would ride out their camels in a race, and whichever camel crossed the finish line last would win the fortune for its owner. ( ① ) during the race, the two brothers wandered aimlessly for days, neither willing to cross the finish line. ( ② ) in desperation, they asked a wise man for advice. ( ③ ) he told them something. ( ④ ) what did the wise man say? ( ⑤ ) the wise man simply told them to switch the camels.
오, 여기서 답이, 사번예요, ,,,,,,,,,,,,,,,,,,,,,,, 1번이후부터 해석이 제대로 안됩니다. 도와주세요

글구 왜 답이 사번인지요,,,,,,,,,,,,,,,,,,, ㅠㅠ