During Induction of Anesthesia, a 60-Year-Old Man's Blood Pressure Decreases

During induction of anesthesia, a 60-year-old man's blood pressure decreases to 55/35 mm Hg. His electrocardiogram still shows a normal sinus rhythm. What initial therapy do you recommend?

A) Packed red cell infusion
B) Plasma infusion
C) Infusion of a balanced electrolyte solution
D) Infusion of a sympathomimetic drug
E) Administration of a glucocorticoid