Which statement about the Link Control Protocol （LCP） is true？（）

• A、LCP is used for basic PPP link setup and operation.
• B、LCP is used for PPP CHAP authentication.
• C、LCP is used for PPP over ATM （PPPoA） setup.
• D、LCP is used for PPP over Ethernet （PPPoE） setup.
• E、LCP is used for PPP over Frame Relay （PPPoFR） setup