The correct option is
B who
Answer : B
Explanation:
Relative pronouns are the pronouns that are used to introduce the
dependent clause in the sentence. It can be for either the object or the
subject.
Here, in this question, the relative pronoun with which we are
supposed to fill the blank should correctly represent the object
("people"), which is the antecedent word.
Thus the most appropriate word from among the options is "who".
The relative pronouns used to refer to people are: "who", "whom", "whose", "that".
"which" is used to refer to objects,
"where" is used to refer to place,
"when" is used to refer to time,
and thus those all are inappropriate for use here.
Therefore the complete correct sentence is:
Do you like the people WHO Sarah invited to her party?