The correct answer is A) there is no real dividing line between Asia and Europe.
What most confuses the division of continents is there is no real dividing line between Asia and Europe.
The dividing line between Asia and Europe is nor a real one. It's a historical or cultural division for events that happened so long ago. Most of the times, the geography, the physical or natural division serves as markers that divide on the continent from the other. It could be Oceans, Seas, Lakes, Mountain chains, forests or rivers.
In the case of Europe and Asia, there is not exactly a physical distinction, just what documents say. But is commonly accepted as the line of the Aegean Sea, the Caspian Sea, the Black Sea, the Greater Caucasus, and the Ural Mountains.
