For many years, the mexican government was a democracy dominated by a one-party system. a. true b. false

For many years, the mexican government was a democracy dominated by a one-party system; b. False

The correct answer is A) True. 

   A dominant-party system or one-party dominant system, is a system where there is "a category of parties/political organisations that have successively won election victories and whose future defeat cannot be envisaged or is unlikely for the foreseeable future. 

Hope this helps!

---JUSTAVERY