Answer: :
La litosfera es la parte exterior sólida de la Tierra, incluida la parte superior frágil del manto y la corteza
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The correct answer is C."Hace dos Años que estudié". This is because "Hace dos Años" Means "about two years" so it's giving information about time. Also "que estudié" means "that I Studied" so it's giving the action that was done at that time so that leads me to Believe my Answer.
