**Core Concept**
Economic evaluation in healthcare often involves comparing the costs and benefits of different interventions. In this context, the interpretation of benefits is crucial to assess the overall value of a treatment or service. The correct method for interpreting benefits is essential to make informed decisions about resource allocation.

**Why the Correct Answer is Right**
The interpretation of benefits in terms of results achieved is a key concept in outcomes research. This approach focuses on measuring the actual effects of an intervention on patient health outcomes, quality of life, or other relevant endpoints. By analyzing the results achieved, decision-makers can determine the effectiveness of a treatment or service and make informed decisions about resource allocation. This approach is often used in cost-effectiveness analysis (CEA) and cost-utility analysis (CUA), where the benefits are measured in terms of quality-adjusted life years (QALYs) or other relevant outcomes.

**Why Each Wrong Option is Incorrect**
**Option A:** This option does not specify how benefits are interpreted, making it an incomplete answer.
**Option B:** This option may be incorrect as it does not clearly state that benefits are interpreted in terms of results achieved.
**Option C:** This option may be incorrect as it does not provide a clear explanation of how benefits are interpreted.

**Clinical Pearl / High-Yield Fact**
When interpreting benefits, it's essential to focus on the results achieved by an intervention, rather than just its cost or other factors. This approach helps decision-makers understand the actual impact of a treatment or service on patient outcomes.

**Correct Answer: D.**