What is the name of the constitutional principle, established in Article 25, that designates certain strategic sectors — petroleum, electricity, nuclear energy and lithium — as exclusively reserved for the state, barring private ownership?

• A Monopolio de Estado
• B Patrimonio nacional
• C Reserva federal
• D Areas estrategicas ✓

Areas estrategicas (strategic areas) are sectors where only the state may own and operate — a core tenet of economic nationalism dating to the 1938 oil expropriation, amended most recently in 2022 to include lithium.