Which of the Following Can Explain Why It Is Easier

Which of the following can explain why it is easier to condition an animal to perform a natural behavior than a less natural one?

A) Biologically instinctive responses may limit our ability to condition less natural responses.
B) An animal may drift back to an innate response even after learning a less natural operant response.
C) Animals may perform innate natural responses rather than trained responses even if they are not reinforced for the innate responses.
D) All the answers are correct.