Definition: In this task, you will be presented with a question that has multiple possible answers. You should choose the most suitable option out of "A", "B", "C", "D", and "E", based on your commonsense knowledge.
Input: Question: The archaeologist was seeing artifacts that he had lost long ago while reading a textbook, what did this bring up? 
 Options: A thinking B poor planning C painful memories D learning E angry 

C