Read the excerpt from "Broken Chain." He [Alfonso] turned his bike over, balancing it on the handlebars and seat, and flossed the spokes with the sock. When he was finished, he pressed a knuckle to his teeth until they tingled.

Why does Soto most likely describe Alfonso’s attention to his bike and his teeth at the same time?

to emphasize that Alfonso expects everything to be perfect
to reveal that Alfonso is too focused on unimportant things
to illustrate how much Alfonso cares about outward appearances
to show that Alfonso often puts himself in uncomfortable situations