A doctor needs to administer 2 mL of a 100 mg/mL solution to a 200 lb. patient. However, the doctor has the solution available only in 20 mg/mL strength. What volume of the 20 mg/mL solution would be needed to administer the desired dose? A.) 10 mL B.) 30 mL C.) 40 mL D.) 20 mL