Some sentences contain problems with pronoun reference. Select the revised version that uses pronouns correctly; or, if the original sentence is correct, select No change. Historians have analyzed the reasons for the collapse of sophisticated cultures in the past, and it resonates with readers today. Historians have analyzed the reasons for the collapse of sophisticated cultures in the past, a topic that resonates with readers today. Historians have analyzed why sophisticated cultures in the past have collapsed, which resonates with readers today. No change