Question: When an MBMS client receives a regular HTTP GET request with an 'Accept' header not containing 'application/3gpp-partial', but has received a partial file with at least one byte, how should it respond?
Option 1: Respond with HTTP/1.1 404 Not Found and include 'Content-Type: application/3gpp-partial' in the response.
Option 2: Respond with HTTP/1.1 200 OK and provide the complete file in the response body.
Option 3: Ignore the request and wait for a partial-file-accept request before responding.
Option 4: Respond with HTTP/1.1 416 Requested Range Not Satisfiable without including any file content.
Explanation: According to the MBMS protocol, when an MBMS client receives a regular HTTP GET request that doesn't specify acceptance of partial files but has already received part of the file, it should indicate the requested resource cannot be found in its entirety. This is achieved by responding with a 404 Not Found status, hinting at partial file handling capability through the 'Content-Type: application/3gpp-partial' header, aligning with managing client expectations and protocol efficiency in multimedia broadcast/multicast services.