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The correct answer is D. However that does not mean that the citizens do not have a love for the home country, in fact much the opposite. They love the country so much that they wish to expand its borders and contribute to its glory.
Because of the trading posts in Lisbon, it became the only entrance point for Asian goods into Europe. It was either that or deal with the Arab traders through the middle east and that was not economically viable, so they all started trading with Portugal.