Which idea about city government is included in the Affirmative? A. City governments require a separate council to legislate business and administrative concerns. B. The deplorable conditions of the cities are caused by economic and social factors. C. Checks and balances between departments are the only way to guarantee successful government. D. Many cities have completely revised the structure of their municipal governments.

First, let's understand what "Affirmative" means. "Affirmative" refers to expressing an agreement or consent to the statement in the question, which is about city government.

We will now look at each option and analyze whether they fit the context of the statement about the idea of city government. A. City governments require a separate council to legislate business and administrative concerns. - This option talks about how city governments are structured and the need for a separate council for specific matters. B. The deplorable conditions of the cities are caused by economic and social factors. - This option focuses on the reasons behind poor living conditions in cities. It points to economic and social factors but doesn't necessarily talk about city government. C. Checks and balances between departments are the only way to guarantee successful government. - This option discusses checks and balances, which are essential for ensuring a successful government. However, it does not specifically talk about city governments. D. Many cities have completely revised the structure of their municipal governments. - This option mentions cities and their municipal governments. It implies that there have been changes to the structure of city governments in many cities, possibly aiming to improve them.

Based on our analysis of the options, option D (Many cities have completely revised the structure of their municipal governments) is the most suitable answer for the idea about city government included in the Affirmative. This is because it directly refers to municipal governments, which are city governments, and implies that they have undergone changes to improve their structure.