Psychology personlity assessment

A key problem with codetype interpretation is that  
    
A    not all researchers identify codetypes in the same way.

B    although two profiles may have the same highpoint pairs, they may differ in
      significant ways from a prototypic pattern for the codetypes on other scales.  
      
C    coding a profile on only two or three scales omits substantial information.  

D    All of the above.