Which of the Following Statements Best Explains the Concept of "Relevant

Which of the following statements best explains the concept of "relevant range"?

A) All costs behave in the same manner, regardless of the level of production.
B) Over a large enough range of production, all costs are generally considered fixed.
C) Management focuses mainly on how costs behave within the levels of production that are reasonably likely to occur.
D) Over a small enough range of production, all costs are generally considered variable.
E) All of the above