Correct option is B
Explanation:
The correct answer is their.
"Their" is a possessive determiner, used to show ownership or possession.
It is used to modify a noun, indicating that something belongs to the people or things previously mentioned. For example, "This is their book."
Information Booster:
Possessive determiners are words that are used before a noun to indicate possession or ownership. They include words like my, your, his, her, its, our, and their.
In the sentence "They took their bags," "their" modifies bags, indicating possession.
Possessive determiners are distinct from possessive pronouns, which function alone without a noun. For example, "The book is theirs" (possessive pronoun).
Additional Knowledge:
An: An is an indefinite article, not a possessive determiner. It is used before words that start with a vowel sound, such as "an apple" or "an umbrella."
This: This is a demonstrative determiner, used to refer to something specific that is near in space or time, not to indicate possession.
That: That is also a demonstrative determiner, used to refer to something specific that is farther away in space or time, not to indicate possession.