Which statement best describes a similarity between fascist and communist governments?

They both flourished during times of economic prosperity and social stability.

They both supported international revolution.

They both used terror and indoctrination to keep power.

They both found allies among business leaders and wealthy landowners.

A. They both used terror and indoctrination to keep power

The correct answer here is the option C.

Both the communist and the fascist regimes maintained power through the use of fear and indoctrination. Those opposed to the governments would usually disappear and the terror to some degree kept people in check. The use of propaganda was high and very effective in portraying the regimes as heroic and for the people even with all the evidence to the contrary.