Answer:
c. Seated in a chair in front of the patient
Step-by-step explanation:
When conducting a head-to-toe examination as part of a preventive health care assessment, it is generally most appropriate to be seated in a chair in front of the patient. This position allows you to maintain direct eye contact with the patient and have easy access to all areas of the patient's body for examination. It also facilitates communication with the patient during the examination, ensuring they feel comfortable and informed throughout the process.