Answer:
Option C.
Step-by-step explanation:
Named after Ferdinand von Zeppelin of Germany, a Zeppelin is a kind of hard airship. German military throughout the First World War extensively used the Zeppelins as bombardiers and scouts against Britain. The Zeppelins were usually filled with hydrogen which provided more weight but were combustible. The importance of Zeppelins can be seen in the fact that they were difficult for the enemies to shoot down.