A parent of a 4-month-old exclusively breastfed infant asks for guidance on introducing solid foods. The infant has good head control, sits with support, and shows interest in the parents' food. Which of the following is the most appropriate recommendation?
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A
Introduce iron-fortified single-grain cereal mixed with breast milk immediately.
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B
Wait until the infant is exactly 6 months old, has lost the tongue-thrust reflex, and can sit independently.
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C
Start with puréed vegetables and fruits, offering them three times a day.
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D
Advise the parent to continue exclusive breastfeeding and re-evaluate for signs of readiness around 6 months of age.