Answer: A.) Greenmail.
Explanation: In the context above, Gamma Corp is acting as a greenmailer who buys substantial or sizeable share of a company's stock which is capable of instigating a hostile take over bid of the underperforming company. In other to thwart the takeove by Gamma Corp who is the greenmailer in this context, the underperformung company wl have to splash out a premium in other to repurchase the stocks ought by Gamma Corp, thereby making substantial earning fro.the deal.