Which excerpt from Fast Food Nation best states a reason supporting the author’s claim that fast food restaurants follow the assembly line model?

The assembly line model divides work into standardized steps, with products moving through a production process. Choice B describes hamburger patties traveling on a conveyor belt through a broiler and emerging cooked, directly illustrating that model. The other choices describe suggesting extra items, the length of an operations manual, or staffing—not food moving through an assembly-line process.

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