Question：Which of the following is not a poison pill in the context of mergers and acquisitions?
　　A. Allowing holders of the target's equity shares to buy shares at a bargain price if an undesirable acquisition takes place.
　　B. Arranging a counter-bid for the predator company.
　　C. The entire management team of the target resigning when its shares are acquired by a predator.
　　D. Allowing all existing holders of the target's shares except the acquirer to buy additional shares at a bargain price.
　　The correct answer is: Arranging a counter-bid for the predator company. Although this is a tactic that the target company can use if there is a takeover bid, a poison pill is designed to make the target less attractive to the acquiror, by for example increasing the costs that the acquiror has to pay.