Which of the Following Examples of Synaptogenesis Was NOT Discussed

Which of the following examples of synaptogenesis was NOT discussed in the text?

A) Rats living in enriched living environments show differences in brain structure and functioning compared to rats in typical cages.
B) Humans who receive extensive training in Braille show increases in the size of brain regions responsible for processing the sense of touch.
C) Humans who are pastry chefs can distinguish more sweet flavors than other kinds of chefs can.
D) Skilled musicians show a reorganization of brain regions responsible for controlling the finger positions of their instruments.