Read the excerpt from "Flight into Yesterday."
Amelia pushed both throttles forward. The plane moved slowly, heavy with fuel for the long ocean flight that lay ahead. At last it began to gather speed. It went fast and faster, hurtling toward the cliff. Almost at the very edge she felt it leave the ground. They were safely off, flying low over the ocean, but flying. Now she could concentrate on gaining altitude. She could start picking out the islands that would serve as landmarks for the early part of the flight.
How does this excerpt help develop the central idea of the passage?
It explains the process of flying the plane.
It describes the toll the trip took on her.
It demonstrates her role as a pioneer.
It shows why the trip was so risky.