Final answer:
Getting clients' height and weight before chemotherapy is important to calculate the correct dosage of the treatment. Correct option is C.
Step-by-step explanation:
Option C, "Height and weight are needed to calculate the correct dosage of chemotherapy," indicates an understanding of the importance of getting clients' height and weight before chemotherapy. Height and weight are essential in determining the appropriate dosage of chemotherapy drugs. Based on the patient's weight and height, the healthcare team can calculate the correct dose that will be effective and safe for the individual.