Answer:
D. The Highland Fruit Festival, (1999-2001), had the best apples and the sweetest watermelon.
Answer: Famished (happy to help)
Explanation:
The sentence that contains an infinitive phrase is A) He visited Congress to gather support for his proposal.
The infinitive phrase is <em>to gather.</em>
A proper noun would just be something like this “Our city won the Nobel prize for its flowers” I hope this helped you :)