A nurse is collecting data from a client who has thrombocytopenia. The nurse should identify which of the following findings increases the client's risk for injury.

A. Incorrect. Wearing a face mask around others is not directly related to thrombocytopenia and does not impact the risk of injury in this context. B. Incorrect. Sleep duration is not directly related to thrombocytopenia and does not impact the risk of injury in this context. C. Correct. Using a firm-bristled toothbrush can increase the risk of bleeding in a client with thrombocytopenia due to potential gum injury. Soft-bristled toothbrushes are recommended to minimize the risk of injury and bleeding. D. Incorrect. Increased intake of green, leafy vegetables is generally beneficial for health and does not increase the risk of injury in thrombocytopenia.