Which of the following are common elements of a GET request?

In the context of HTTP requests, a GET request specifically is designed to retrieve data from a server. The essential components of such a request include a method, which indicates the type of action to be performed (in this case, "GET"), a resource, which specifies the address of the data being requested (like a URL), and the protocol version, which identifies the version of HTTP being used (e.g., HTTP/1.1). This combination is crucial for the server to understand how to process the request and determine what data should be returned.

While other options refer to elements that could appear in HTTP requests, they do not accurately capture the fundamental components associated with a GET request. For example, while an endpoint and header are important in requests, they do not encompass the core elements defined in option B. Similarly, data and a body are relevant to other types of requests (like POST) but are not typically present in a GET request, as GET requests do not have a body. A footer is not an element of an HTTP request at all, making that option incorrect. Hence, option B is the most comprehensive and fitting choice regarding the basic elements of a GET request.