A Client Overhears the Healthcare Team Talking About Pharmacogenomics

A client overhears the healthcare team talking about pharmacogenomics. The client asks the nurse what that means. Which statement provides the best example of pharmacogenomics?
A) "The study of individuals' history of a penicillin allergy and the use of gene transplants to change the allergy."
B) "The study of individuals' genetic background and how it affects their response to drug therapy."
C) "The study of individuals' genetic history and how it affects their genetic polymorphisms."
D) "The study of individuals' ability to determine their genetic predisposition and prevent chronic diseases."