Crete was the crossroads that linked what three cultures?

Crete was the crossroads that linked Africa, Asia, and Europe,
America and Australia are too far from Crete (which is in Greece, in the Mediterranean Sea), which is why other answer cannot be correct. Crete has a blend of all of those three cultures and has created a unique culture based on them. 

Master planned communities outside of chicago. note: population density means people living in an area per square mile. chicago, an urban and highly populated area has a much more higher density than a desert, amish community, settlement, or nomadic region.

The correct answer is:   [b]:   "physical systems" .