A client newly diagnosed with diabetes mellitus suddenly becomes confused and weak. Which intervention(s) should the nurse implement? Select all that apply.

A. Giving the client 4 ounces of orange juice can quickly raise blood glucose levels if hypoglycemia is suspected. B. Administering insulin is inappropriate without knowing the current blood glucose level, especially if hypoglycemia is suspected. C. Diet carbonated soda does not contain sugar and will not help raise blood glucose levels. D. Checking the client's fingerstick blood glucose is essential to determine if hypoglycemia is causing the symptoms. E. Obtaining blood pressure and pulse rate is important to assess the client's overall condition and identify any additional complications.