Correct Answer: B

Rationale: Choosing a diet that is low in fat and cholesterol is crucial for managing and preventing the progression of coronary artery disease (CAD). This dietary change can help reduce the risk of further complications associated with CAD, such as plaque buildup in the arteries. It is a fundamental lifestyle alteration that can positively impact the client's heart health.

Correct Answer: B

Rationale: For clients with peripheral arterial disease experiencing leg pain while walking, gradually increasing daily walking distance is beneficial. This approach helps improve circulation, build tolerance, and reduce symptoms over time. Compression stockings can also be recommended for some clients to assist with circulation, but the priority teaching point in this scenario is to promote gradual increases in walking distance to enhance vascular health and symptom management.

Correct Answer: A

Rationale: A calm and quiet environment helps reduce stress and prevents the occurrence of chest pain in clients with angina.

Correct Answer: C

Rationale: Bibasilar crackles are abnormal lung sounds that indicate fluid accumulation in the lungs, a sign that left-sided heart failure is worsening. This finding suggests that the client's condition is deteriorating and requires prompt intervention to prevent further complications.

Correct Answer: C

Rationale: In a client with coronary artery disease (CAD), ensuring the availability of oxygen and a flowmeter at the bedside is crucial. Oxygen is essential for adequate oxygenation, which helps prevent myocardial ischemia, a common complication in CAD.