Final answer:
Pam Markesan, Mr. Mendez's neighbor, and the reporter are all primary sources.
Step-by-step explanation:
The eyewitness accounts mentioned in the article are Pam Markesan, Mr. Mendez's neighbor, and the reporter sent out to the military bases. Based on the information provided, all three of them can be considered as primary sources. Pam Markesan and Mr. Mendez's neighbor directly witnessed the events involving the UFO sightings and Mr. Mendez's disappearance. The reporter, on the other hand, observed the damaged saucer-shaped craft inside the hangar and had direct interactions with the military base. Therefore, the correct answer is C- Pam Markesan and the neighbor are primary sources; the reporter is not.