Cola Wars

Ace Cola has decided to begin a multi-million dollar ad campaign to increase its lagging sales. The ads are to be based on consumers preferring the taste of Ace Cola to its major competitors, Best Cola, Coala Cola, and Dkimjgo Cola. An independent testing agency conducted a carefully controlled taste test on 50 randomly selected cola drinkers. Their results are summarized in the following table. (In the table, A represents Ace, B represents Best, etc.)

 
 A
B C
C
D
B
A
D
B
A
C
D
B
A
B
D
C
A
D
C

Unfortunately for Ace Cola, the results seem to show that Ace is not the preferred cola. Using plurality, Coala is first and Ace is last. Using run-off or the standard Borda method, Best is preferred. 

 

Ace needs some help with this dilemma.