The correct answer is (C) A trite remark; a platitude; an overused remark that is platitudinous and boring. Also, any compound containing a metal and bromine (e.g., potassium bromide). Potassium bromide used medicinally as a sedative.

Examples of use:

• Whenever he visits, he finds it necessary to drop a bromide or two, which, I suppose, substitutes for knowledge.
  
  
• When she needed a sedative, she would take potassium bromide.