This is because iron is more reactive than copper in the metal reactivity series.
If the question is asking you all except which, the answer is "people fled the urban centers because they had become too crowded and unsanitary"
The correct answer is C. Egypt I believe correct me if I am wrong!
The answer would most likely have to be Nevada
Both the processes of creating a timeline and thinking chronologically are similar in that both require thinking about time as a series of events that take place one after the other--as opposed to focussing on similarities and connections between events that may be "out of order" on a given timeline.
