The correct answer is B. endpoints.
Endpoints are the points of interaction between an application and its environment. They can be used to monitor the application by collecting data about its performance, such as the number of requests it receives, the time it takes to respond to requests, and the errors it encounters. This data can be used to identify and fix problems with the application.
Actuators are devices that can be controlled by an application. They can be used to change the state of the application’s environment, such as turning on a light or opening a door.
Boot is the process of starting up an application. It involves loading the application’s code into memory and initializing its data structures.
Hypermedia is a way of organizing information using links. Links can be used to connect different parts of an application, or to connect an application to other applications or resources.
In conclusion, endpoints are the most appropriate option for monitoring an application because they provide access to the data that is needed to track its performance.