Which of the following was common under Porfirio Diaz' regime, also known as the Porfiriato?
A. free elections B. direct democracy C. corrupt elections D. an unchanging constitution
It would be "corrupt elections" that was common under Porfirio Diaz' regime, also known as the Porfiriato, since Diaz ruled with a tight fist, although this was also a time of relative stability.