Final answer:
President George H.W. Bush focused on diplomatic solutions in the late 1980s, easing tensions through cooperation, notably with the Soviet Union, and participating in international measures such as the Gulf War coalition, contrary to the more unilateral policies of his son's later administration.
Step-by-step explanation:
In the late 1980s, President George H.W. Bush did not adopt isolationist policies; instead, he focused on diplomatic solutions in foreign affairs. This approach is evidence that the main answer to the question is that President Bush sought to ease tensions, particularly with the Soviet Union, and stressed the need for peace and cooperation. His administration showed a readiness to participate in international coalitions as demonstrated by the formation of an international coalition that drove Iraqi forces from Kuwait during the Gulf War. It's important to note that the statement that President George W. Bush was a proponent of liberal internationalism in his foreign policy is false, as it refers to his son's administration and not to his own policies during his presidency.A clear understanding of these policies can be seen in the contrast with the later policies of his son, President George W. Bush, who took a more aggressive stance in foreign relations, including a sudden refusal to participate in environmental treaties and abrogating existing agreements. George H.W. Bush's foreign policy was characterized by diplomacy and cooperation, which diverges from the more unilateral and militaristic approaches of subsequent administrations.In conclusion, during his term, President George H.W. Bush prioritized diplomacy and international cooperation, rather than isolationism, aggressive expansionism, or increased military interventions, making option 'c' the most accurate of the provided choices.