Final answer:
President Trump's engagement in talks with North Korean leader Kim Jong-Un is an example of a diplomatic solution to an American foreign policy issue.
Step-by-step explanation:
An example of an attempt to find a diplomatic solution to an American foreign policy problem is A. President Trump engaging in talks with North Korean leader Kim Jong-Un. This was a significant instance where dialogue was initiated between the United States and North Korea, especially after a period of escalating tensions related to North Korea's nuclear missile development. The other options either involve aid, compliance with external suggestions, or covert operations, which do not qualify as diplomatic talks or negotiations.