The government of mexico is a federal republic. what does this mean?
a. separate states can govern themselves
b. government is under one central authority
c. separate states unite under one government
d. a single person has power in the government

A Federal Republic is a system in which a country is a federation of partially independent states (in Mexico those are for example Estado de Mexico, Oacaca...) but these states unite under one central government. This central government deals for example with foreign relations.  

The correct answer is: c. separate states unite under one government

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Some states did honor the voting rights for women