When you're reading a 3rd person story, you get to see the thoughts of everyone, what they're feeling, all that good stuff. B is 2nd person, C can be 2nd person or 1st person, and D is 1st person.
so... third person limited the narrator only knows the thoughts and feelings of one character. All characters are described using pronouns, such as 'they', 'he', and 'she'. But, one character is closely followed throughout the story, and it is typically a main character.
