Answer: The sentence that uses 'who' correctly is "Who is the person that I should call?".
Explanation: 'Who' is a relative pronoun and, unlike 'which', it is used to refer to people. Moreover, it is used to refer to the subject of a sentence. However, it should not be confused with 'whom', which is another relative pronoun since 'whom' should be used when referring to the object of a verb or a preposition. In the sentence 'Who is the person that I should call?', the use of 'who' is correct because it makes reference to the subject of that sentence. In contrast, the use of 'who' in the other options is incorrect: 'whom' is the relative pronoun that should have been used to function as object of the verb and object of the prepositions 'from' and 'to'.
please make me brainiest if that is ok :)
