When a Mother Nurses Her Child for the First Time

When a mother nurses her child for the first time, the sucking of the infant stimulates the release of milk. Within a few weeks of birth, the cry of the infant stimulates the same response. Which of these is a fixed behavior?

A) releasing milk in response to sucking
B) releasing milk in response to crying
C) both a and b
D) neither a nor b

Correct Answer:

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