SIP-I (SIP with encapsulated ISUP) is an extension of SIP used in VoIP networks. What is the primary advantage of using SIP-I in modern telecommunications networks?A) It eliminates the need for signaling gateways between SS7 and SIP networksB) It ensures end-to-end QoS (Quality of Service) in all IP-based networksC) It allows the seamless transfer of ISUP signaling information across SIP-based networksD) It replaces the need for both SIP and ISUP signaling protocols in VoIP networks