Answer:
Most of the forgetfulness occurred in common personal memories in the daily lives of these people.
Explanation:
Research with people who reported memories of the September 11 terrorist attacks shows that these people have strong memories about the time of the attack and the events that occurred after that, however, these people have difficulty remembering trivial events that occurred in 11 September, but before the time of the attack.
This happens because of the flashbulb memory, which is a type of memory that is strongly related to strong emotions arising from a traumatic public event.
