The western European countries located on the coast of the North Sea are known as the:
O A. Delta Countries.
O B. Landlocked Countries.
O C. Low Countries.
O D. Upland Countries.

Correct answer is C. Low Countries.

Explanation:

Option C is the only correct answer as it refers to area consisted of Netherlands, Belgium, but also parts of other countries in Western Europe, including France, Germany...

A is not correct as it refers to countries created in delta of certain rivers. Good example is Egypt (Nile).

B is not correct as it refers to countries that are not opened to seas or oceans - Andorra, Liechtenstein, Serbia...

D is not correct as it refers to mountainous countries, such as Nepal for example.

because the early people found out about it.