The assembly line was a system through which items were mass-produced in a flow.

my answer to your question is "fast"

continuous

Explanation:

Assembly line can be defined as a form of production in which several workers, with the help of machines, specialize in specific and repetitive functions, working in a sequential, continuous way. This is the case when an industrial establishment with the aid of machines turns raw materials and semi-finished products into finished products intended for consumption. The most characteristic form, the one of the assembly in series, was invented by Henry Ford, American businessman of the auto industry.

the percentage of students at the school need special diets is

c) 10 percent