Staff evaluation

As an administrator, Bernard conducted yearly evaluations of his subordinates. The evaluations were weighed heavily in management promotion decisions.  Recently, two of Bernard’s subordinates Apple and Barry were competing for a new administrative post.  Bernard worked well with Apple but Apple’s performance was average.  If Apple worked alongside Bernard as a peer, she would not challenge Bernard or threaten his position in the firm.  Barry, by contrast, was outstanding; but his tendency to shake things up and push for changes made it very difficult for Bernard to work with.  Foreseeing Barry’s potential in the company, Bernard was worried that his position in the company would be threatened if Barry got promoted.  On the other hand, Bernard also knew that his peer administrators kept average-performing supporters to themselves through the staff evaluation process. 

Should he write a strong annual evaluation for Apple but an average one for Barry?  Between Apple and Barry, who would be better for the firm and who would better off with Bernard?