When someone says: \"you should know what is wrong.”, this is a example of which communication roadblock? a) mixed messages b) tuning out. different outlooks c) silent treatment.

"You should know what is wrong"  is an example of : C. silent Treatment

People have different way of thinking and point of view. You can't hope that another person is 100 % understand and see your way of thinking.
Rather than hoping that someone else magically 100 % able to read your mind, it's better to just communicate what's bothering you and think it's wrong.

Not addressing the real issue is simply the same as an act of silence

hope this helps