Google should have the answer to ths
I believe that eyewitness are not a reliable source to solve a crime or problem. Those eyewitness play a major role in the investigation meaning that they have a advantage to change minds. Some studies think that people over the age of 50 years old aren't reliable for testimony. Though, some might think that study accusation is absurd, it may be correct in some ways.
Hope I could help! :)
Avars and sassanids I hope this helps
Answer:
sinkhole is the answer.......
