Which of the following was common under Porfirio Diaz' regime, also known as the Porfiriato?

Afree elections
Bdirect democracy
Ccorrupt elections
Dan unchanging constitution

Verified Answer :

D.) corrupt elections 
Do you want the explanation on why?

C) Corrupt elections were common under Porfirio Diaz's regime, also known as the Porfiriato.
Although he ruled with a tight fist, and his country flourished during his reign, it was still illegal how he got to actually rule Mexico, because he established a dictatorship.