This is there correct sentence:My Oldest brother's coin collection includes some rare and valuable items. They correct option is C. A noun with an apostrophe mark at the back expresses a possession, that is, it shows what belongs to a particular person.
brother's ;
The correct option to complete the sentence is C, 'brother's,' as it indicates that the coin collection belongs to one brother. The possessive form shows ownership, which fits with the context of the sentence. The other options do not accurately convey this meaning.
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