Pronouns in the objective case may function as objects (B).
The definition of objective case is the form of a noun or pronoun used as an object. The object may be a direct object, indirect object, or object of preposition. The objective case changes personal pronouns. Personal pronouns are me, you, him, her, it, us, we, and them. For example:
Pronoun: She
Objective case pronoun: Her
Sentence with objective case pronoun: I went with her.
"Her" is acting as the direct object. "She" takes the objective case and becomes her. It would not be correct to say "I went with she."