The Russian Physiologist Ivan Pavlov Discovered That ________

The Russian physiologist Ivan Pavlov discovered that ________.

A) dogs would salivate to the sound of a ticking metronome due to habituation
B) dogs would salivate to the sounds of a ticking metronome due to reflexology
C) dogs would salivate to the sound of a ticking metronome due to a learned reflexive response called conditioning
D) dogs would salivate to the sounds of a ticking metronome due to their fear response