The correct answer is: C. cost-benefit analysis.
A cost-benefit analysis is a systematic approach to estimating the costs and benefits of a project, program, or policy. It is used to compare the costs and benefits of different alternatives and to determine which alternative is the most cost-effective.
A cost analysis is a study of the costs associated with a project, program, or policy. It is used to determine the total cost of the project, including the direct and indirect costs.
A benefit analysis is a study of the benefits associated with a project, program, or policy. It is used to determine the value of the benefits that will be achieved by the project.
A cost-benefit analysis is the most comprehensive approach to determining the value of a project, program, or policy. It takes into account both the costs and the benefits of the project.
A cost analysis and a benefit analysis are both useful tools for determining the value of a project, but they do not take into account the costs and benefits of the project.
Therefore, the correct answer is: C. cost-benefit analysis.