Answer: c. How does DNA influence a person's health?
Step-by-step explanation:
The questions related to science can be answered by using suitable scientific procedures.
Among the options given, c. How does DNA influence a person's health? is the correct option because the genetic makeup of the person can be known by applying suitable scientific techniques like Polymerase chain reaction and DNA fingerprinting. The expression of genes is repsonsible for development of proteins in the body some of which can be antibodies which fight against disease causing pathogens and keeps the body healthy.