The Discovery of Yellow Amber in Southern Europe Originating Hundreds

The discovery of yellow amber in southern Europe originating hundreds of miles to the north tells us what about the upper paleolithic era?

A) Early humans engaged in networks of trade and exchange across significant distances.
B) Amber used to be in abundance in southern Europe, but due to ecological changes is no longer available in that region of the world.
C) Early human bands likely fought one another on a regular basis for valuable goods.
D) Humans developed sophisticated vessels to transport goods early on in their history.