Which diplomatic approach is categorized under Linkage Diplomacy?

The correct answer is linked to Nixon's diplomatic strategy, which is characterized by the concept of Linkage Diplomacy. This approach involves connecting issues or regions with one another to create a more comprehensive framework for negotiations and diplomatic relations. Nixon utilized this strategy during the 1970s to build relationships, particularly with the Soviet Union and China, by linking arms control discussions to other areas of interest, such as trade and regional conflicts.

By integrating multiple topics into the diplomatic dialogue, Nixon was able to create a more favorable environment for cooperation. This multifaceted approach allowed him to leverage progress in one area to encourage concessions or advancements in another, demonstrating how interdependencies can be strategically employed in international relations.

The other options reflect differing diplomatic styles or strategies not focused on the same type of connectivity among issues or countries. For instance, Trump's style emphasizes direct and often unorthodox communication methods, Obama's approach was more about building consensus through collaborative techniques, and Biden's multilateralism centers on strengthening alliances and working through international institutions. While these are all notable diplomatic strategies, they do not embody the essence of Linkage Diplomacy as clearly as Nixon's approach does.