I believe there are 33 countries but I don’t know for sure
The purchase of Alaska in 1867 marked the end of Russian efforts to expand trade and settlements to the Pacific coast of North America, and became an important step in the United States rise as a great power in the Asia-Pacific region.
High mountains and access to water (the sea, not rivers) meant that
navies were critical for war and trade.
This also meant that the different city states of Ancient Greece were
physically separated from each other.
This allowed each culture to have similarities (like language and
religion), but also significant differences like the Spartan vs. Athens
systems. This also led to a particular
type of farming and a limited ability to fight in open plains. Hence the Hoplite system with phalanxes
became dominant.
I think it's B but I am still looking for the answer