Which mountain range runs along the eastern coast of Luzon and is the longest on the island?

Answer and explanation

Correct answer: C. The Sierra Madre

  1. Step 1: Lying in the eastern portion of Luzon is the longest mountain range in the Philippines, the Sierra Madre, stretching from Quezon province in the south to Cagayan in the north. Answer: The Sierra Madre. Why not the others: None of these fit: The Cordillera Central; The Zambales Mountains; The Caraballo Mountains.

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