im gonna save ur time

Kaasen had always thought Balto was brave. He would be proved right.

—Susan Butcher and the Iditarod Trail,
Ellen M. Dolan

Which prediction is supported by this detail from the passage?

Balto will do something that is heroic.
Kaasen will need to leave his dogs behind to carry out his mission.
Kaasen will do something that is heroic.
The vaccine will make it to Nome in time to save many children.
its A.