A nurse is caring for a client who came to the emergency department reporting chest pain. The provider suspects a myocardial infarction. While waiting for the troponin levels report, the client asks what this blood test will show. Which of the following explanations should the nurse provide the client?

D Troponin is a lipid whose levels reflect the risk for coronary artery disease. A Troponin is a heart muscle protein that appears in the bloodstream when there is damage to the heart. B Troponin is an enzyme that indicates damage to brain, heart, and skeletal muscle tissues. C Troponin is a protein that helps transport oxygen throughout the body.