fwiw: Gemini gets this wrong!

   The answer is most likely Answer B: ooo  ooo  xoo.

   Here's why:

   The pattern repeats every three rows.
   The first three rows establish a pattern of "x" alternating between the first 
   and third columns. "o" fills the remaining spaces.
   Looking at the last two sets of three rows, we see ooo xoo ooo followed by 
   ooo ooo oxo.
   Following the established pattern, the next set of three rows should be ooo 
   ooo xoo, completing the cycle.
   While other answers might fit in a single instance, they wouldn't maintain 
   the consistent pattern throughout the entire sequence.