Final answer:
A parametric analysis is used to address the question: Does an intervention work better with some or all of its parts?
Step-by-step explanation:
A parametric analysis is used to address the question: Does an intervention work better with some or all of its parts? This type of analysis focuses on examining the impact of different variables or components of the intervention on its effectiveness.
For example, in a study on the effectiveness of a new teaching method, a parametric analysis may investigate whether using additional instructional materials or increasing the duration of lessons improves student outcomes.
Therefore, the correct option is D) Does an intervention work better with some or all of its parts?