From 1884 to 1911, Porfirio Diaz ruled Mexico by shutting down all opposition through violence and intimidation. His time in office is known as the "Porfiriato". Porfirio Diaz is credited with the establishment of the "rurales", or bandits that the president heavily armed so that they could carry out his orders. This passage best supports the conclusion that Porfirio Diaz's government in Mexico was --

a
a representative government
b
a communist government
c
a dictatorship
d
a monarchy