Stephon is writing an essay that compares and contrasts characters from two different texts. The two characters he is comparing and contrasting are Manjiro from Heart of a Samurai and William, the narrator of The Boy Who Harnessed the Wind. One similarity he notes is that Manjiro and William both face internal struggles. Which sentence from The Boy Who Harnessed the Wind most suggests that William faces internal struggles?

The preparation was complete, so I waited.
My knees buckled, but I held on.
I started wasting time in the trading center playing bawo.
Reading on my own was difficult.