Select the correct text in the passage.

Which sentence in this excerpt from "In Another Country" by Ernest Hemingway reinforces the skepticism the soldiers have for the rehabilitation machines?
My knee did not bend and the leg dropped straight from the knee to the ankle without a calf, and the machine was to bend the knee and make it move as riding a tricycle. But it did not bend yet, and instead the machine lurched when it came to the bending part. The doctor said: "That will all pass. You are a fortunate young man. You will play football again like a champion."

"But it did not bend yet, and instead the machine lurched when it came to the bending part."