Which river forms the natural boundary separating Argentina from the Oriental Republic of Uruguay?
Answer and explanation
Correct answer: C. The Uruguay River
- Step 1: The Uruguay River forms the entire eastern border of Entre Ríos and Corrientes with Uruguay. Step 2. Key border cities include Concordia (facing Salto) and Gualeguaychú (facing Fray Bentos). Answer: The Uruguay River. Why not the others: It joins the Paraná to form the Río de la Plata.
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