Final answer:
Fast-food restaurants often reduce costs by increasing menu items to cater to varying tastes, attracting a larger customer base and achieving economies of scale.
Step-by-step explanation:
Fast-food restaurants often use the strategy of increasing menu items to cater to varying tastes in order to reduce costs. By offering a wide range of menu items, they can attract a larger customer base and increase sales. This allows them to achieve economies of scale, which can help reduce costs. For example, if a fast-food restaurant is able to purchase ingredients in bulk for a larger menu, they may be able to negotiate lower prices with suppliers.