Concept:The idiom "born with a silver spoon in the mouth" means being born into a wealthy and privileged family.
Explanation:This is a well-known English idiom and must not be read literally.
A silver spoon has traditionally been a symbol of affluence, high social status, and an aristocratic upbringing.
When someone is described as being born with a silver spoon in their mouth, it means that from birth they enjoyed riches, comfort, and material ease because of their family's wealth.
Such children inherit money, property, and luxury without having to work for them.
In this sentence, those children were born into an environment of affluence, so they were born in wealth and luxury.
Option A is wrong because an idiom is figurative, not literal.
Options B and C are incorrect because this expression points specifically to financial advantage, not to health or ordinary happy homes.
Answer:D. in wealth and luxury