The nurse auscultates a client's heart sounds and hears a midsystolic click associated with mitral valve prolapse. Which diagnostic test should the nurse prepare the client to expect the healthcare provider (HCP) to prescribe?

A. Troponin and creatine kinase-myocardial band (CK-MB) levels: These cardiac biomarkers are used to assess myocardial injury, such as in acute coronary syndrome. They are not appropriate for evaluating valvular abnormalities like mitral valve prolapse. B. Computed tomography (CT) scan of the chest: A CT scan of the chest is used to evaluate pulmonary conditions, aortic dissection, or mediastinal structures, but it is not the test of choice for assessing cardiac valve function or structure. C. 2D-echocardiography: Echocardiography is the primary diagnostic tool for evaluating mitral valve prolapse. It allows real-time visualization of valve structure and function, including leaflet motion and regurgitation severity, making it the most appropriate step after identifying a midsystolic click. D. 12-lead electrocardiogram (ECG): An ECG can detect rhythm disturbances or signs of chamber enlargement but cannot diagnose structural valve issues. While useful as part of a general cardiac evaluation, it is not specific enough for diagnosing mitral valve prolapse.