Read this excerpt from Susan Butcher and the Iditarod Trail.

Many of the officials thought that one of the planes, reassembled, was the best answer. But it had an open cockpit, and its pilot had never flown at night or in January's subzero temperatures. If the plane iced up or crashed, both the pilot and the serum could be lost. On the other hand, it normally took almost a month to complete a dogsled journey from Nenana to Nome. It was a difficult choice.

Which clue in the text best helps readers predict that officials will decide the journey should be by dogsled instead of by plane?

Which clue in the text best helps readers predict that officials will decide the journey should be by dogsled instead of by plane?

Many officials thought that a reassembled plane was the best choice.
Both the pilot and the serum would be lost if the plane crashed.
It took almost a month to travel from Nenana to Nome by dogsled.
The choice between travel by plane or by dogsled was a difficult one.