Final answer:
Donna is the experimenter using an approach consistent with empiricism because she carefully measures and observes the effects of certain foods on her behaviors.
Step-by-step explanation:
The experimenter who is using an approach consistent with the principles of empiricism is Donna. Donna is carefully measuring and observing the effects of certain foods on her behaviors. This approach aligns with empiricism because it involves collecting measurable evidence through observation and measurement, which can support or refute her hypothesis. By following the systematic steps of the scientific method, Donna's experiment is based on objective observations and data.