Question

Read this excerpt from Susan Butcher and the Iditarod Trail.

Meanwhile “Wild Bill” faced a number of problems. The temperature had dropped to fifty degrees below zero. Speed was important, but he could not push his team too hard. The dogs' lungs might frost from breathing heavily in the Arctic air. To protect his own lungs, Bill breathed only through his nose. The bitter wind howled and hurled snow in his face. The trail was a blur.

Which conclusion can be formed based on the information in the excerpt?

The mushers were more concerned about their own safety than the sick people in Nome.
The mushers’ lungs were so used to cold Arctic air that it no longer posed problems for them.
The mushers risked their own lives and their dogs’ lives to help the people of Nome.
The mushers’ exposure to cold Arctic air caused them problems with their eyesight.

Answer 1

The mushers risked their own lives and their dogs’ lives to help the people of Nome.

Explanation: the lungs of the humans and dogs could frost over if they are not careful they are risking a lot.