Final answer:
The nurse should identify a client diagnosed with kidney disease as a client with secondary hypertension.
Step-by-step explanation:
Secondary hypertension refers to high blood pressure that is caused by an underlying medical condition or factor.
Out of the given client scenarios, the correct one for the nurse to identify as a client with secondary hypertension is option B: a client diagnosed with kidney disease. Chronic kidney disease can lead to an increase in blood pressure.
Secondary hypertension can also be caused by other factors such as an endocrine disorder or the use of certain drugs. However, based on the options given, the client with kidney disease would be the most appropriate choice for secondary hypertension.