What are two basic concepts of Knowledge-Centered Support (KCS)? Choose 2 answers

What are two basic concepts of Knowledge-Centered Support (KCS)? Choose 2 answers
A . Evolving content-based product lifecycles
B . Creating content as a result of solving issues
C . Rewarding learning, collaboration, sharing and improving.
D . Developing a knowledge base on the experience of an individual

Answer: B,C