https://www.reuters.com/article/giphy-m-a-facebook-cma/facebook-fights-british-watchdog-to-retain-gif-maker-giphy-idUSKBN2G41AV >Facebook has made a case for not selling Giphy in a strongly worded response to Britain's competition regulator, a document showed on Wednesday, and questioned if the watchdog could order the U.S. company to divest the GIF-maker.