Final answer:
France likely felt a desire to retaliate against Britain after being expelled from the Americas, providing a motive to support the American Revolution, which they did by entering into an alliance with the American colonies.
Step-by-step explanation:
After being almost completely kicked out of the Americas by Britain, France might have sought revenge and supported the American Revolution as a way to undermine British power. In fact, France did help the United States during the American Revolution, as evidenced by the crucial alliance formed after the American victory at Saratoga in 1777. Moreover, the Treaty of Alliance in 1778 obligated the United States to assist France in the event of a conflict with Great Britain. The aftermath of the American Revolution strained relations as America navigated neutrality during the French Revolutionary wars, despite the alliance. However, when considering who might help the Americans during the Revolution, it's reasonable to suggest France had strong motives to offer support as retaliation against Britain.