Answer:
B. Norway
Step-by-step explanation:
Operation Weserübung was the code name for the German assault on the neutrals Denmark and Norway during the Second World War. This attack triggered the Norwegian Campaign, which would be won by the Germans. The name of the operation means "Exercise on the Weser", this being a German river.
At 4:15 in the morning local time, the "Weser hour", on April 9, 1940, the "Weser day", Germany invaded Denmark and Norway, supposedly to protect them from a possible attack by France and the United Kingdom.