There's no shift in person -- all nouns and pronouns are 3rd person singular.
All subjects agree with their verbs.
There is no comma splice.
There's only one left ... do you see the shift in tense?
"In Shakespeare's Romeo and Juliet, Juliet's mother rejected her, because of the power of Lord Capulet, and Juliet rejects the Nurse in the same scene, calling her a 'wicked fiend.'" This statement:
has a subject and predicate that don't agree in number.
includes a comma splice.
includes a pronoun with no appropriate antecedent.
*** includes a shift in person.
includes a shift in tense.
2 answers
Oooooh, I see it now! "Rejected" and "rejects." Thank you! :)