Hey there! I'm happy to help!
Let's look at our answer options real quick about how it was possible for the French and Indian War to lead to the Revolutionary War.
1. The British made the Americans fight all by themselves.
2. It made the Indians fight against the colonists.
3. The French and Indian War was lost so they had to fight all over again.
4. The French and Indian War left many unresolved issues.
Answer #1 is wrong because the British and the Americans fought together in the French and Indian War.
Answer #2 is incorrect because the Indians fighting against the colonists in the French and Indian war has nothing to do with the Revolutionary War.
Answer #3 is incorrect because the British defeated the French, not the other way around.
Answer #4 is the only answer left and it makes sense. War is very expensive and the British were in a lot of debt because of it, and this led them to start taxing the Americans which triggered them and started the Revolutionary War.
Therefore, the answer is The French and Indian War left many unresolved issues.
Have a wonderful day! :D