What is the missing piece and why?

IQ test matrix

I think it is pretty interesting but I cannot find any pattern. Do you have any idea?

  • 1
    $\begingroup$ looks like puzzling.stackexchange.com/questions/59760/… $\endgroup$ – deep thought Nov 28 '18 at 6:45
  • $\begingroup$ Looks like the old tests as mentioned above, only the correct answer here seems to be mirrored around the vertical axis. Are we being trolled? $\endgroup$ – j3App Nov 28 '18 at 8:24