Final answer:
The library in the scenario functions as a a. nonrivalrous good because multiple people can study there simultaneously without impacting each other's ability to use the library for the same purpose.
Step-by-step explanation:
The situation described in the question, where you can go to the library and find a quiet place to study without interfering with anyone else's ability to do the same, implies that the library is a nonrivalrous good. In this context, a nonrivalrous good is one where one person's use of the good does not diminish the ability of others to use it as well. For example, public radio can be listened to by anyone with a radio without preventing others from also listening - making it nonrivalrous. Conversely, consuming a slice of pizza would be rivalrous because once one person has eaten it, another person cannot. Therefore, while you were at the library, the library functioned as a nonrivalrous good because multiple people could use it for study without affecting each other's ability to study.