Your Sister Attempts to Condition Her Dog to Salivate at the Sound

Multiple Choice

Your sister attempts to condition her dog to salivate at the sound of a bell. She gives the dog a biscuit and a second later rings the bell. She does this several times, but no conditioning seems to occur. Why isn't this conditioning working?

A) There should be at least a five-second interval between the biscuit and the bell.
B) The bell was probably not loud enough for the dog to notice it.
C) The bell should have been rung before the dog ate the biscuit.
D) The conditioned response and unconditioned stimulus must be simultaneous.