The answer to the question "Which of the following would prevent Japanese intervention in its neighboring island of the Philippines?" The answer is D. The Treaty of Portsmouth; once WW2 ended, the Treaty of Manila established the independent nation of The Philippines, preventing any future intervention from Japan. The Gentlemans Agreement, would not have any legal standing; The Roosevelt Corollary was dealing with the US's involvement with Venezuela; The Root-Takahira Agreement was one between US and Japan; and the Teller Amendment were conditions on the US military in Cuba.
The treaty that would prevent Japanese intervention in its neighboring island of the Philippines is the Root-Takahira Agreement. It affirmed territorial sovereignty, mutual respect for Pacific possessions, and the principle of the Open Door policy. ;
The response highlights that none of the options directly prevent Japanese intervention in the Philippines. However, the best relevant choice would be C. The Root-Takahira Agreement, as it aimed to create a foundation for peaceful relations in the Pacific. Ultimately, Japan's ambitions in the Philippines would later unfold irrespective of these agreements.
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