Final answer:
Breakeven analysis is typically used during the C) business analysis stage of the new-product development process to ascertain the product's financial viability by weighing marginal costs against marginal benefits.
Step-by-step explanation:
Breakeven analysis is a tool that marketers are likely to employ during the business analysis stage of the new-product development process. The purpose of the break-even analysis is to determine when a product will be able to generate enough revenue to cover its costs, which is crucial in the business planning phase. Marketers need to weigh the marginal costs against the marginal benefits, incorporating a cost/benefit analysis to decide whether the new product is financially viable. Using a T-shaped chart in breakeven analysis can help visualize and compare the costs on one side to the benefits on the other. This analysis helps determine if the expected sales volume is enough to cover the costs and if the project should proceed, be modified, or be abandoned.