Answer:
A. The baby's bottle was empty.
Explanation:
Possessive nouns are nouns used to show ownership, i.e. that something owns something else. In most cases, a possessive noun is formed by adding an apostrophe and s to the noun. If the noun is plural and already ends in s, only an apostrophe is added.
The sentence that contains a properly written possessive noun is sentence A. The bottle is owned by the baby. An apostrophe and s are properly added to this noun.
In sentence B, the apostrophe should be placed before s in girls'. If the noun was plural, it would've been correct, but it is singular.
In sentence C, there is no possessive noun.
In sentence D, the apostrophe should be placed before s in mens'. Men is the plural form of man, and the possessive form is men's.
