The correct answer is letter C. <span>Knowledge is necessary for self-regulation and behavior modification because "understanding current behaviors is vital to changing them." You cannot change someone until you know and understand thoroughly. But knowing oneself is the basic and foundation. You won't be able achieve self-regulation if you really don't know yourself.</span>
It means true friends are hard to find but when you do find them hold them close because they're worth so much. Fake friends are literally everywhere around you and mean nothing/worth nothing.
