Final answer:
The total population needs to be divided evenly by the number of districts, which is 9, to find out how many people work in each district. When performing this division with the given population of 9,658,521, none of the provided answer options match the even number that is obtained. Hence, there's an error in the question or the provided options.
Step-by-step explanation:
To find out how many people work in each district, you would divide the total population by the number of districts. In this case, we have a total population of 9,658,521 people and 9 districts. Performing the division gives us:
9,658,521 ÷ 9 = 1,073,169. However, this number is not one of the options, and it's not an even number which is a requisite stated in the problem. We need to find the closest even number to this result. The closest even number that we can round down to is 1,073,168. When we divide this number by 9, we indeed get an even number of people per district which is:
1,073,168 ÷ 9 = 119,240
This result doesn't match any of the options given. Therefore, it seems there's an error in the question or in the provided options because none of the listed choices match the even distribution of the city's population across nine districts. Based on the correct mathematical process, none of the options (a, b, c, or d) provide the right answer if we assume an even number of people must work in each district.