Final answer:
The recommended delay for cord clamping in vigorous babies is 1 to 3 minutes (120 seconds) to enhance iron status and decrease iron deficiency risk.
Step-by-step explanation:
In the context of newborn care, the question regarding how long cord clamping should be delayed in vigorous babies is addressed by several health organizations. The current recommendation by the World Health Organization is to wait for 1 to 3 minutes before clamping the cord in vigorous, full-term infants to allow for placental transfusion. This practice is believed to improve the iron status of the infant and reduce the risk of iron deficiency during the first months of life. Thus, the most correct answer among the given options would be d) 120 seconds.