Which of the Following Interactions Can Correctly Be Labeled Coevolution

Which of the following interactions can correctly be labeled coevolution?

A) the tendency of coyotes to respond to human habitat encroachment by including pet dogs and cats in their diets
B) a genetic change in a virus that allows it to exploit a new host, which responds to virus-imposed selection by changing its genetically controlled habitat preferences
C) a genetic change in foxes that allows them to tolerate human presence (and food)
D) the adaptation of cockroaches to human habitation
E) the ability of rats to survive in a variety of novel environments