Final answer:
The primary trigger for shaking a baby, commonly known as the shaken-baby syndrome, is frustration or anger (option c). This usually happens when parents or caretakers are unable to soothe a baby's cries, resulting in violent responses such as shaking or causing an impact to the infant's head.
Step-by-step explanation:
The primary trigger for shaking a baby, also known as shaken-baby syndrome, is frustration or anger, thus the answer is c) Frustration or anger. This often occurs when parents or caretakers find themselves unable to soothe a baby's cries and resort to violent shaking or causing impact to an infant's head as a form of physical abuse. This results in serious medical symptoms such as brain swelling and retinal hemorrhage. Though it is worth noting hunger, sleep deprivation, and teething can result in a baby crying, which can subsequently evoke frustration or anger from the caretaker, the actual act of shaking is directly linked to the caretaker’s emotional state, not the baby's condition.
Learn more about Shaken-Baby Syndrome