According to paragraph 1, why has trade been so important throughout the history of the Middle East ? A. The rare and valuable metals and stones found in Middle Eastern deserts have Always been in high demand in surrounding areas. B. Growing conditions throughout the Middle East are generally poor forcing Middle Eastern people to depend on imported grain. C. Many useful and decorative raw materials cannot be found naturally in the Middle East but are available from neighboring regions. D. Frequent travel due to limited water supplies in the Middle East created many Opportunities for trade with neighboring societies.