Answer:
D. WBC count
Step-by-step explanation:
First, let's define symptom and sign.
A symptom is some sort of evidence that could suggest a disease or disorder, but it must be observed and noticed by the patient. Basically, it's what the patient feels.
So, a headache, pain, and nausea are all symptoms.
A sign is evidence that someone else observes or collects. So, a family member or doctor sees signs.
Therefore, temperature, white blood cell count, and pulse are all signs.
The question asks us which is a sign, not a symptom. Therefore, the best choice is D. WBC count