A client with leukemia undergoes a bone marrow biopsy. The client's laboratory values indicate the client has thrombocytopenia. Based on this data, which nursing assessment is most important following the procedure?

A. Monitoring skin elasticity is important for assessing hydration status but is not directly related to the risk of bleeding after a bone marrow biopsy in a client with thrombocytopenia. B. Assessing body temperature is important for detecting signs of infection but is not the most immediate concern following a bone marrow biopsy in a client with thrombocytopenia. C. Measuring urinary output is important for assessing renal function but is not the most immediate concern following a bone marrow biopsy in a client with thrombocytopenia. D. Observing the aspiration site is the most important assessment following a bone marrow biopsy in a client with thrombocytopenia because thrombocytopenia increases the risk of bleeding at the site. It is crucial to monitor for signs of bleeding, such as hematoma formation or continued bleeding, and to apply pressure as needed to prevent or control bleeding.