A Patient Is Brought to the Health Care Provider's Office

A patient is brought to the health care provider's office with a headache, lethargy, nausea, vomiting, and a fever, which has developed over the past few days. The nurse begins collecting data about the possible causes of the symptoms. Which information indicates a possible cause for encephalitis?

A) The patient has recently exhibited flu-like manifestations.
B) The patient lives in a home where a child has chickenpox.
C) The patient has been camping within the last few weeks.
D) The patient has experienced a stiff neck for 3 days.