A Client Complains of Oral Mucosal Irritation or Sensitivity

A client complains of oral mucosal irritation or sensitivity.Which of the following actions are appropriate for this situation?

A) Keep the client npo and use nystatin mouthwash.
B) Use hydrogen peroxide to loosen and remove debris from the mouth.
C) Rinse the mouth with warm water.
D) Allow the client to drink fluids but not to eat solid foods.