Fiction Points to Characters Such as Shakespeare's Iago and Machiavelli's

Fiction points to characters such as Shakespeare's Iago and Machiavelli's Prince, who manipulate the emotions of others for their own devious ends. To avoid negative outcomes, why must organizations must wary of individual managers who practise the 'dark side' of EI tactics?

A) Those high in EI, given competition for scarce resources typical in many organizations, are likely to use their skills to advance their own interests even at the expense of others in the workplace, which may prove detrimental to the organisation.
B) Those with strong EI abilities may, 'display emotions that are inappropriate nor conducive to achieving objectives because their emotional presentation is aligned to their inner feelings'.
C) Those with high EI are likely to focus on those individuals who are strategically important to them. This could mean colleagues are looking for clues in their line manager and immediate colleagues.
D) Managers with high EI may be unable to spot signs of strength or competencies in their rival, which as a result, they could not gain an advantage in the negotiations. This may not enable them to gain additional resources or reduce any pressured targets.