Price discrimination is the answer i believe
The Major province of the Gulf of Tonkin resolution was to empower President Johnson to take any necessary steps, which were required to bring security and peace in the South East Asia, not only nationally, but also internationally. The resolution was passed by the Congress in 1964.
The south opposed the national roads in the west
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Hope this helps :D
One of the first cash crops that Europeans brought back from the tropical climates of Southeast Asia was "coffee". Coffee was in high demand because it had sparked a European revival of ideas and enthusiasm.