As a result of the terrorist attacks on September 11, 2001,
approximately 1,000 people died.
the al-Qaeda terrorist group formed.
the US declared a “war on terror.”
US allies declared a “war on terror.”

the right choice would be a. culture within the city-state. c. loyalty to the police. d separation by land and sea.

geography

this is because warmer climates often don't get people sick from the flu and regions where it was often colder more people received the flu. hope this if you need more reasoning i am here to