Answer:The correct answer is D. pagiging mabuting mamamayan. Here's why: American Education Focus: The American education system during the Philippine colonial period aimed to create citizens loyal to the United States. This meant promoting values like democracy, civic responsibility, and patriotism.Other Options: A. ituro ang wikang Espanyol: While Spanish was still spoken, the Americans emphasized English as the language of instruction and administration. B. ipalaganap ang Kristiyanismo: While Christianity was already established in the Philippines, the Americans didn't actively promote it as the primary goal of education.C. pagiging mabuting Kristiyano: This was a secondary goal, as the Americans focused on creating a modern, secular society. Key Takeaway: The American education system in the Philippines was designed to create citizens who were loyal to the United States and who could contribute to the development of a modern, democratic society.