Social/ etiquette/ limit/ what/ can/ say/ but/ non-verbal/ cues/ can/ communicate/ thoughts.

• A. 
  Social etiquette limits what can say, but non-verbal cues can communicate thoughts.
• B. 
  Social etiquette limit what can be said, but non-verbal cues can communicate thoughts.
• C. 
  Social etiquette limits what can be said, but non-verbal cues can communicate thoughts.
• D. 
  Social etiquette limited what can be said, but non-verbal cues can communicate thoughts.