Final answer:
George Washington faced foreign issues such as conflict with Native American tribes and the Quasi-War with France. He used military and diplomatic efforts to address these challenges, which were crucial for the nation's security and economic development.
Step-by-step explanation:
The foreign issues that George Washington had to face as president included: a) Conflict with Native American tribes, dealing mainly with their resistance to the encroachment of settlers on their lands and the British support of their cause; and c) Quasi-War with France, an undeclared naval conflict between the United States and France. The other options, b) War of 1812 and d) Mexican-American War, occurred after Washington's presidency and therefore were not challenges he faced.
During Washington's presidency, he addressed the foreign policy challenges by relying on military action to handle conflicts with Native American tribes and utilizing diplomacy to manage relations with European powers like Britain and Spain. These nations threatened the territorial integrity of the United States by supporting Native tribes, discriminating against American merchants, and controlling important waterways such as the Mississippi River.