## Core Concept
Cost-effectiveness analysis in healthcare is a method used to compare the costs and outcomes of different medical interventions or studies. This type of analysis helps in making economically sound decisions by evaluating which option provides the best outcome at the lowest cost.

## Why the Correct Answer is Right
The correct answer, **Cost-effectiveness analysis**, is specifically designed to compare the cost of two or more studies or interventions and choose the one that is economically superior. This analysis involves calculating the cost-effectiveness ratio, which is the cost per unit of outcome (e.g., cost per life saved, cost per quality-adjusted life year). By comparing these ratios, decision-makers can select the most economically viable option that also provides the desired health outcomes.

## Why Each Wrong Option is Incorrect
- **Option A: Cost-benefit analysis** is incorrect because, while it does involve comparing costs and benefits, it typically converts all outcomes into monetary terms, which is not the focus of cost-effectiveness analysis.
- **Option B: Cost-utility analysis** is a type of cost-effectiveness analysis but is more specific, focusing on the utility or quality of life outcomes. It's not the broad term for comparing costs and choosing the economically superior option.
- **Option D: Incremental cost-effectiveness ratio (ICER)** is a measure used within cost-effectiveness analysis to compare the additional costs and benefits of one option over another. However, it is not the term for the overall process of comparing costs and choosing the economically superior study.

## Clinical Pearl / High-Yield Fact
A key point to remember is that **cost-effectiveness analysis** is crucial in healthcare economics as it helps allocate limited resources efficiently. A common application is in the evaluation of new treatments or screening programs, where decision-makers must choose between options based on both their effectiveness and cost.

## Correct Answer: C. Cost-effectiveness analysis