Jim Cramer commented on several mergers while answering viewers’ social media questions from the floor of the New York Stock Exchange on Monday. Cramer, who’s portfolio manager of TheStreet’s Action Alerts Plus and host of CNBC’s ‘Mad Money,’ was asked when Pfizer (PFE) and Allergan (AGN) will merge. Cramer believes the two companies won’t unite until the third quarter of next year because it’s a complex merger, but he added that he’s not worried about the tax inversion issue. Cramer also talked about JAB Holding’s purchase of Keurig Green Mountain (GMCR) for $13.9 billion, saying it’s a great deal for Green Mountain. Coca-Cola (KO), which is Keurig’s biggest single shareholder, has said it is supportive of the deal. On the recent news that Amazon (AMZN) is teaming up with Baidu (BIDU)on the content side, Cramer said investors should continue to buy Amazon. Cramer commented on a few retailers, saying Rite Aid (RAD) is a stock to hold onto, and that when Macy’s (M) stock falls to $35, it might be time to pull the trigger. Send your questions to Jim Cramer on Facebook and Twitter - @JimCramer, using #CramerQ.