Which county government system most resembles the structure of the federal government?

the mayor-council system
the supervisor system
the council-manager system
the council-executive system

i am sure it is not c or a

the right answer for the question that is being asked and shown above is that: "their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful.  " the  participant in european imperialism is being described below is that  their policy of "divide and rule" pitted political groups against each other to keep any one group from becoming too powerful. 

this is a good question! i'll do some research and come back when i have the answer!