A relatively complex series or sequence of responses, over a period of time (longer than a few seconds) that is inborn, involuntary, unlearned, automatic, relatively non-conscious, and characteristic of every single member of that species is known as: __________.
A. a reflex.
B. an instinct.
C. imprinting.
D. reflex and instinct
E. reflex, instinct, and imprinting