What is the purpose of LCP?

What is the purpose of LCP?
A . to perform authentication
B . to negotiate control options
C . to encapsulate multiple protocols
D . to specify asynchronous versus synchronous

Answer: B

Explanation:

In order to be sufficiently versatile to be portable to a wide variety of environments, PPP provides a Link

Control Protocol (LCP). The LCP is used to automatically agree upon the encapsulation format options, handle varying limits on sizes of packets, detect a looped-back link and other common misconfiguration errors, and terminate the link. Other optional facilities provided are authentication of the identity of its peer on the link, and determination when a link is functioning properly and when it is failing.

Reference: Link Control Protocol

http://www.ietf.org/rfc/rfc1661.txt