The answer you're looking for would be the "Alps".
Because of the wide variety of people
1) Personal Scrapbook
A picture of what junior prom dresses looked like...
Ticket stub from Titanic
2) Corporate Business Records
Vote from a shareholders meeting...
Graph showing net profits and losses...
3) Government Census Data
The population of the three largest cities...
The number of citizens under age 18....
4) University Archives
Publications by English Department faculty....
Alumni Association bylaws...
<span>The cost of borrowing money is called interest</span>
Historians look for causes and effects that help to explain how and why events happened.