Which of the Following Is Not a Problem Making It

Multiple Choice

Which of the following is not a problem making it difficult to evaluate purchasing performance? 

A)  The difference in the scope of purchasing both within and between companies. 
B)  The lack of formal objectives and performance standards. 
C)  The time it takes to evaluate purchasing performance. 
D)  The time it takes to evaluate purchasing performance
E)  The accuracy with which purchasing
performance actually can be measured.