In a comparison-contrast report, it is best to: 

A. focus on alternatives when the criteria are easy to separate. 
B. focus on alternatives when one alternative is clearly much better than the others. 
C. focus on criteria when the reader will intuitively grasp the alternative as a whole rather than the sum of its parts. 
D. focus on alternatives when the superiority of one alternative over another depends largely upon which criteria are most important to the reader.