Problem: Yokoyama is a 22-year-old Japanese male who weighs 200 pounds. What factors should be taken into account when determining an appropriate drug dosage for Jiro, and why? Group of answer choices Only his age should be considered because it is the only factor that influences dosage calculations. Ethnicity should not be considered but both his age and weight influence drug dosage calculations. Only his weight should be considered because it is the only factor that influences dosage calculations. His age, weight, and ethnicity should all be considered because they all influence drug dosage calculations.