Answer:
D) the attitude in the US towards submarine warfare in World War I.
Step-by-step explanation:
According to a different source, this is the cartoon that the question refers to. In this cartoon, the author states what the thoughts and concerns of the Unites States were during the early years of World War I. The cartoon references submarine warfare, and states that the latest victim of this should be the last. The author wants to indicate his commitment to both the war and submarine warfare being over.