In the Financial World, the Term Poison Pill Refers To

In the financial world, the term poison pill refers to:

A) The restructuring of a firm such that the stock is delisted and no longer available to the public.
B) A type of financial agreement that forces firms to buy back their securities at a stated price.
C) An unfriendly takeover offer that is so attractive it cannot be refused.
D) An unfriendly takeover that replaces the existing management.
E) A tactic to make unfriendly takeover attempts unappealing.