Régimen es el ordenamiento político establecido en una sociedad por los poderes constitucionales que obran sobre ella, así como el conjunto de autoridades políticas del Estado.
The correct answer C. Pectinoid is the most occurring fossil that is a bivalve. They are a superfamily of marine bivalve mollusks which includes scallops and oysters. Members of this family have a triangular resilium.
Which countries are an option?
I'd say counties because there are way more of them
My guess would be D. Agriculture.