The use of submarines on the high seas to sink any and all enemy ships of Germany (

A. Unrestricted submarine warfare

O

B. internationally banded war tactic

C. totally inefficient use of war material

O

D. resulted in few deaths

A. Unrestricted submarine warfare

Explanation:

The use of submarines on the high seas to sink any enemy ships of Germany is "Unrestricted submarine warfare."

This was a declaration made by the German government in February 1915, concerning the waters surrounding Great Britain which was declared a war zone. The declaration was to destroy any German enemy's warship in the area.

option a

explanation:

to cleberate the end of their war

its many islands, high mountains, and remote peninsulas isolated population centers.