Which of the Following Is Not True of Sign Tracking

Multiple Choice

Which of the following is not true of sign tracking?

A) The subject need not do anything to receive the US.
B) Learning proceeds most rapidly when the CS is presented just before the US.
C) Subjects will approach the CS even if the CS and the US are presented at random times in relation to each other.
D) Sign tracking has been demonstrated in a variety of species, including human children.