Which Item Below Best Illustrates the Concept of Code Switching

Multiple Choice

Which item below best illustrates the concept of code switching?

A) a navy vet who talks one way with his shipmates but quite another way when interviewing for a civilian job
B) a child who speaks one way at age three but quite another way at the age of five
C) a Jamaican who speaks patois at home and at work
D) a woman who speaks the same way to her kids as to her husband