Final answer:
The appropriate possessive noun in this case would be children's (option b).
Step-by-step explanation:
The appropriate possessive noun in this case would be children's (option b).
A possessive noun is used to show ownership or possession. In this case, we are talking about the clothes that belong to the children. The apostrophe and the letter s ('s) is added to the word 'children' to show possession, making it 'children's'.
Example: The children's toys are on the shelf.
Learn more about Possessive nouns