Read this excerpt from Susan Butcher and the Iditarod Trail.

What is the best inference a reader could make from this

excerpt?

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.

The only choice Bill had was to move as quickly as

possible.

Bill did not understand how to handle the cold Arctic

weather.

Moving too quickly could cause Bill and his dogs to

become ill or die

Bill could not see the trail because of how quickly his

team was moving