When a client sends a REST request to an application server, which of the following scenarios happens? Select one: a. The server searches in the filesystem for a file named after its path, and returns it to the client b. The server executes the method mapped to its WSDL interface C. The server looks at the mapping of paths to user applications, and executes the one mapped to the request d. The server looks at the request, and executes the Python method specified by the 'Content-type' header