In many agencies, a formal structure and informal structure exist. The differences between these may ...

In many agencies, a formal structure and informal structure exist. The differences between these may be reflected in which of the following?
 
  I. What the formal lines of communication are, versus whom actually communicates with whom.
  II. What a particular job description says, versus what the individual in the job actually does.
  III. What the board of directors deems appropriate allocation of funds, versus what is actually spent.
  IV. What the official policy is on a given issue, versus what actually happens if the issue arises.
 
  A. II and III
  B. I, II and IV
  C. I and III
  D. I, II, III, and IV