During her psychology test, Shelby could not remember the meaning of the term proactive interference. Surprisingly, however, she accurately remembered that the term appeared on the fourth line of a left-hand page in her textbook. Her memory of this incidental information is best explained in terms of

The correct answer is a. when they started making tools that will them in cultivating lands, they could raise crops and that made them attached to one place for a longer period of time. after that, they started domesticating animals and building their own permanent settlements that resemble the ones we have today.

Ithink it's c selection but i don't really know.