Question: What is the primary security concern for the "application/mbms-reception-report+xml" MIME type, as identified in its registration?
Option 1: Unauthorized access to the XML schema definition
Option 2: Manipulation of reception report information and potential user privacy breaches
Option 3: Incompatibility with various device encodings (e.g., UTF-8, UTF-16)
Option 4: Insufficient interoperability across different MBMS applications
Explanation: The correct answer, Option 2, highlights the dual security concern for the "application/mbms-reception-report+xml" MIME type: (1) the potential manipulation of the reception report information, which could lead to inaccurate service or file delivery metrics, and (2) the privacy implications, as this information can be linked to specific users, revealing their content consumption habits. These concerns necessitate integrity protection for the XML document instances.