A client with dementia is admitted with a fractured hip after a fall at home. The client's family member witnessed the fall. Four hours after admission, the client's blood pressure increases to a moderately severe hypertensive level. The client pulls on the bedclothes continuously. The client's family member asks for pain medication for the client. What does the nurse conclude?

a) The client is experiencing pain due to the fracture
b) The client is experiencing anxiety
c) The client is experiencing delirium
d) The client is experiencing hallucinations