What is the central idea of the passage? from Friendship by Ralph Waldo Emerson There are two elements that go to the composition of friendship, each so sovereign, that I can detect no superiority in either, no reason why either should be first named. One is Truth. A friend is a person with whom I may be sincere. Before him, I may think aloud. I am arrived at last in the presence of a man so real and equal that I may drop even those undermost garments of dissimulation, courtesy, and second thought, which men never put off, and may deal with him with the simplicity and wholeness, with which one chemical atom meets another. Sincerity is the luxury allowed, but diadems and authority, only to the highest rank, that being permitted to speak truth as having none above it to court or conform unto. Every man alone is sincere. At the entrance of a second person, hypocrisy begins. We parry and fend the approach of our fellow-man by compliments, by gossip, by amusements, by affairs. We cover up our thought from him under a hundred folds. I knew a man who, under a certain religious frenzy, cast off this drapery, and omitting all compliments and commonplace, spoke to the conscience of every person he encountered, and that with great insight and beauty

(A): Mutual admiration and loyalty form the bond of real friendships.

(B):Honesty and authenticity are the foundations for true friendships.

(C):Sacrifice and support are important to preserve true friendships.

(D):Integrity and compliments form trust required in real friendships.