Refer to the Graphs Below

Multiple Choice

Refer to the graphs below.
The figure shows data from an infant who sucked on a pacifier in order to hear sounds. By comparing graphs B and C, determine which of the following conclusions is supported.

A) The infant can easily tell the difference between any two phonemes.
B) When the infant hears an unfamiliar phoneme, his or her rate of sucking instantly decreases.
C) The less similar two phonemes are, the more likely the infant is to notice a change in sound between the phoneme that is presented first and the phoneme that is presented second.
D) When the infant hears the same phoneme over and over again, his or her rate of sucking increases gradually.