Which sentence in this excerpt from Ernest Hemingway's "In Another Country" uses parallelism?

The correct answer for the question that is being presented above is this one: "A. 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."

Here are the following sentences:

A. 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.

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

C. The doctor said: "That will all pass. You are a fortunate young man. You will play football again like a champion."