Where is the black sea located?
a. eastern europe
b. northern europe
c. russia
d. southern europe

The Black Sea is located in the Southeast of Europe: it's definitely not located in Northern Europe.  Apart from This all the other answers are correct:

It's in Southeastern Europe, so it's in Eastern Europe (A) and Southern Europe at the same time (D).  In the west, Black Sea is located next to Russia (option C).

Answeroil-shale;