A school nurse is assessing a child who fell from playground equipment and landed head-first. Which of the following manifestations indicates the presence of increased intracranial pressure (ICP)?

A. Report of diplopia: Diplopia (double vision) is a sign of increased intracranial pressure affecting cranial nerves. B. Hyperactivity: Hyperactivity is not a sign of increased ICP; instead, decreased consciousness or irritability may be noted. C. Nuchal rigidity: Nuchal rigidity is more associated with meningitis, not necessarily with increased ICP from trauma. D. Tachycardia: Bradycardia, not tachycardia, is associated with increased ICP (part of Cushing's triad: bradycardia, hypertension, irregular respirations).