which of the following is true about the profitability of facebook ads? how to measure profitability of facebook how would you test facebook for an ab test how to test profitability of facebook why would you do an AB test on facebook can fb measure profitability how does the facebook ab test work why do people leave fb what test does fb have to be able to measure profitability can FB test for profitability is a facebook ab test valid how can facebook be tested how is group a test for facebook based on a behavior study? when do people leave facebook what is the difference between group b, group a, group b, group c and group e on facebook? does facebook have any profit margin which test to use when doing an ab test on facebook is the facebook ab test valid how does afb test work how does fb measure a behavior test?