Final answer:
When a nurse evaluates a client's understanding of the calorie content of foods, it involves the cognitive outcome, which pertains to the intellectual abilities like knowledge and understanding.
Step-by-step explanation:
The type of outcome being evaluated when a nurse is assessing a client's knowledge about the calorie content of foods is D) Cognitive. This domain reflects learning that has occurred and involves intellectual skills such as thinking, understanding, learning, and remembering. Teaching about the calorie content of foods is aimed at increasing the client's knowledge base, enabling them to make informed decisions about their diet and understand the implications of different food choices on their weight and overall health, which are essential components of evidence-based behavioral recommendations for weight management.