Final answer:
Eva's mother indicating an effective understanding of discharge instructions would involve her repeating back the key points of the diet progression, showing comprehension and recall.
Step-by-step explanation:
When evaluating if a patient's family member has effectively understood discharge instructions regarding diet progression, we look for active participation and accurate restatement of the information provided. In the context of the provided options, the response from Eva's mother that indicates effective teaching would be that she repeats back the key points of the diet progression.
This indicates that she has listened, comprehended, and can recall the important aspects of the diet, which are critical for the proper care of Eva once discharged. It showcases an understanding that will be important in Eva's recovery and health management going forward. In contrast, asking for clarification, expressing confusion, or ignoring instructions typically imply that the teaching may not have been as effective.