Final answer:
The pronoun 'it' in the sentence should be replaced with 'more power' for clarity. This makes it clear that the power the mayor of Dallas wants is being asked from the city and its citizens.
Step-by-step explanation:
The change that should be made to the sentence 'The mayor of the city of Dallas wanted more power, so she asked the city and citizens to grant it to her' relates to the correct usage of pronouns. In this sentence, the pronoun 'it' is ambiguous as it's not clear what 'it' is referring to. It would be clearer to replace 'it' with 'more power'. So, the revised sentence could read: 'The mayor of the city of Dallas wanted more power, so she asked the city and citizens to grant her this power.'
Learn more about Pronoun usage