Instructions: Prepare detailed responses to the following prompts, synthesizing information from across the provided documents.

1. Trace the evolution from the former Annex C (09/98) to the current Annex C+. Detail what Annex C+ extends and integrates, and explain its overall contribution to the G.729 standard.
2. Explain the complete process of music detection as described in section C+.5.1. Discuss its relationship to Voice Activity Detection (VAD) and Discontinuous Transmission (DTX) with Annex E, and identify the key parameters and conditions that influence its decision-making logic.
3. Analyze the ITU’s approach to intellectual property rights as outlined in the “INTELLECTUAL PROPERTY RIGHTS” section. What is the ITU’s official position on patents that may be required to implement this Recommendation, and what advice does it give to implementors?
4. Describe the structure of the reference C code implementation for Annex C+. Discuss the purpose of the main simulation programs, the command-line options for the encoder, and provide examples of how different software files listed in Table C+.1/G.729 correspond to specific functionalities from the main body and its various annexes (B, D, E).
5. Discuss the significance and hierarchy of the ITU as a United Nations Specialized Agency. Based on the foreword and other contextual information, describe the roles of the ITU, its Telecommunication Standardization Sector (ITU-T), the Study Groups, and the WTSC in standardizing global telecommunications.