Answer:
Jane: Visiting Buckingham Palace has been my dream for so long, thank you so much for coming on this trip with me!
Madison: Of course! I always wanted to see the changing of the guards! And I´ve become so interested in the monarchy since watching The Crown!
J: I´ve been thinking we could rent a car. What do you think? Would public transportation be better than driving ourselves?
K: I guess public transportation should be best because we don´t know our way around London and neither of us has an international driver's license.
A: That´s true. And It probably would be too costly. Besides, we can get a fancy English breakfast before and a few beers after without worrying about drinking and driving.
M: Do you think we may have a chance to see the Queen?
A: I sure hope so!
Explanation:
Buckingham Palace is open for tourist visits. The forecourt of the Royal Palace is where the Changing of the Guard takes place, inviting travelers to observe it.
The sentence in which the underlined infinitive phrase functions as a subject is the last one - to quickly move large groups of people is the purpose of public transportation.
<em>To quickly move </em>is the infinitive phrase, and it is a subject.
