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?

Choice A reason: Assessing body temperature is a routine post-procedure check but not the most critical for thrombocytopenia. Choice B reason: Monitoring skin elasticity is not directly related to the risks associated with thrombocytopenia following a bone marrow biopsy. Choice C reason: Observing the aspiration site is crucial because thrombocytopenia increases the risk of bleeding, and the site must be monitored for any signs of hemorrhage. Choice D reason: Measuring urinary output is important but does not take precedence over monitoring the biopsy site for bleeding in a thrombocytopenic patient.