Read this excerpt from Susan Butcher and the Iditarod Trail.

Which prediction is best supported by a detail in the

excerpt?

But the only really effective way to stop an epidemic

from spreading through the entire town was to

vaccinate people against it. The doctor had a small

amount of vaccine, or serum, but it was five years old

possibly useless—and would not go far. He must find

more.

The townspeople will not agree to be vaccinated

O The doctor will invent a serum to fight the disease.

O The disease will surprise everyone by not

spreading

The doctor will look for ways to obtain more serum.