Question

between 1915 and 1917, how did the strategies the germans used at sea differ from those of the allied powers?

• germany attacked merchant ships and boats of the united states, a country not involved in the war
• germany refused to stop their attacks despite complaints from the united states and other neutral countries
• germany excluded the use of submarines in the types of boats used to attack enemy ships
• germany used their submarines and other military ships for both commercial and military purposes

Explanation:

To solve this, we analyze each option:

• Option 1: The US was neutral initially, but the key difference in strategies (Germany's unrestricted submarine warfare vs Allied Powers' more traditional naval tactics) is better captured by other options. Also, attacking US ships was a later escalation, not the core strategic difference in 1915 - 1917.
• Option 2: Germany's unrestricted submarine warfare (continuing attacks despite US complaints) was a major strategic difference. The Allied Powers likely followed more conventional rules of naval warfare, while Germany took this aggressive, unrestricted approach.
• Option 3: Germany did use submarines to attack enemy ships, so this is incorrect.
• Option 4: Using military ships for commercial purposes is not a defining strategic difference between Germany and the Allies in 1915 - 1917. The main difference was Germany's unrestricted submarine warfare, which Option 2 describes (refusing to stop attacks despite complaints, i.e., unrestricted).

Answer:

B. Germany refused to stop their attacks despite complaints from the United States and other neutral countries (assuming the options are labeled A - D with this as one of them; if the original labels were different, adjust accordingly, but based on content, this is the correct one).