Correct Answer: D

Rationale: An Unna boot is a type of compression bandage that is impregnated with zinc oxide paste. This paste helps to provide a moist environment for the wound, which can promote healing and also has antimicrobial properties. The compression from the Unna boot helps to reduce swelling and improve circulation in the affected area, which is beneficial for treating stasis ulcers. By understanding that an Unna boot contains zinc oxide paste, the home care nurse can ensure proper application and effectiveness in promoting wound healing.

Correct Answer: B

Rationale: Smoking is a major risk factor for developing heart failure. African Americans are at a higher risk of heart failure compared to Caucasians. Additionally, being female and smoking further increase the risk. Smoking damages the blood vessels and heart, leading to various cardiovascular problems including heart failure. Therefore, the 50-year-old African American female who smokes is at the greatest risk of developing heart failure among the given options.

Correct Answer: D

Rationale: Asking the client about their preferred learning strategies is the appropriate action at this time. Everyone learns in different ways, and by identifying the client's preferred learning style, the nurse can tailor the teaching session to be more effective and memorable for the client. Understanding how the client learns best can help in providing information in a way that is easier for them to retain and recall later. It also demonstrates a client-centered approach to teaching, which can improve communication and understanding between the client and the healthcare provider.

Correct Answer: C

Rationale: - Activity C, where class members demonstrate a favorite nursing skill for the class, falls within the affective domain of Bloom's taxonomy. This activity involves showcasing a personal preference and emotional connection to a particular skill, demonstrating feelings and attitudes towards it.

Correct Answer: D

Rationale: Tobacco use is a modifiable risk factor for hypertension. Smoking cigarettes can lead to an increase in blood pressure and heart rate, as well as damage to blood vessels, which can contribute to the development of hypertension. By quitting smoking or avoiding tobacco use, individuals can reduce their risk of developing hypertension and improve their overall cardiovascular health. On the other hand, factors such as age, ethnicity, and family history are non-modifiable risk factors for hypertension, meaning individuals cannot change them through lifestyle modifications.