Why statements about the northern states in the 1780 is accurate

Accurate statements about the words "who" and "whom" are: . Both "who" and "whom" are interrogative pronouns. . Both "who" and "whom" are relative pronouns. . The pronoun "who" is a subject pronoun. . The pronoun 'Whom" is an object pronoun.

They had far fewer large cities than the southern states. They generally had less enslaved labor than the southern states.  I dont know if thsi is one of your answers

(202 bc - 220 ad) dynasty started by lui bang; a great and long-lasting rule, it discarded the harsh policies of the qin dynasty and adopted confucian principles; han rulers chose officials who passed the civil service exams rather than birth; it was a time of prosperity

sorry i tried to but i didn’t get it