Jim Cramer tackled the issue of low oil prices when answering viewers’ questions from the floor of the New York Stock Exchange Thursday. Cramer, portfolio manager for Action Alerts PLUS and host of CNBC’s ‘Mad Money,’ said at current price levels, there won’t be big bankruptcies among U.S. oil companies, but he did point to a column in Real Money on Chesapeake Energy (CHK) that investors should read. Cramer was asked if low oil prices will help airlines like Delta (DAL) and United (UAL), and he said that he’s a believer in Delta, but noted that Southwest (LUV) just reported earnings that reflected price competition. Switching gears, Cramer said he believes Dow Chemical (DOW) and DuPont (DD) will announce a definitive merger deal this week. Action Alerts Plus owns Dow Chemical, and Cramer said he still needs to decide what to do with that stock. Cramer also commented on the news that Yahoo (YHOO) is abandoning plans to shed its stake of Alibaba (BABA), saying he had wanted Yahoo to make some big acquisitions. Instead, Cramer said, ‘they sat on their cash, and that’s the problem.’ Send your questions to Jim Cramer via social media. You’ll find him on Facebook and on Twitter, @JimCramer, use #CramerQ.