What PPP protocol provides dynamic addressing, authentication, and multilink?

The PPP (Point-to-Point Protocol) protocol that provides dynamic addressing, authentication, and multilink capabilities is:

C) LCP (Link Control Protocol)

LCP is responsible for establishing, configuring, maintaining, and terminating the PPP connection. It handles the negotiation of options for features like dynamic addressing (such as IP address assignment through IPCP - Internet Protocol Control Protocol), authentication (through protocols like PAP or CHAP), and multilink (which allows multiple physical connections to be combined into a single logical link).